Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Hubble's law
Table title:
Observed values of the Hubble constant
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date published </th><th colspan=1 rowspan=1 > Hubble constant (km/s)/Mpc </th><th colspan=1 rowspan=1 > Observer </th><th colspan=1 rowspan=1 > Citation </th><th colspan=1 rowspan=1 > Remarks / methodology </th><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > after 1996 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > before 1996 </td><td colspan=1 rowspan=1 > 50–90 (est.) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2019-03-28 </td><td colspan=1 rowspan=1 > 68.0+4.2 −4.1 </td><td colspan=1 rowspan=1 > Fermi-LAT </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Gamma ray attenuation due to extragalactic light. Independent of the cosmic distance ladder and the cosmic microwave background. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2019-03-18 </td><td class="highlighted"  colspan=1 rowspan=1 > 74.03±1.42 </td><td class="highlighted"  colspan=1 rowspan=1 > Hubble Space Telescope </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Precision HST photometry of Cepheids in the Large Magellanic Cloud (LMC) reduce the uncertainty in the distance to the LMC from 2.5% to 1.3%. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2019-02-08 </td><td colspan=1 rowspan=1 > 67.78+0.91 −0.87 </td><td colspan=1 rowspan=1 > Joseph Ryan et al. </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Quasar angular size and baryon acoustic oscillations, assuming a flat LambdaCDM model. Alternative models result in different (generally lower) values for the Hubble constant. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018-11-06 </td><td colspan=1 rowspan=1 > 67.77±1.30 </td><td colspan=1 rowspan=1 > DES Collaboration </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Supernova measurements using the inverse distance ladder method based on baryon acoustic oscillations. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018-09-05 </td><td colspan=1 rowspan=1 > 72.5+2.1 −2.3 </td><td colspan=1 rowspan=1 > H0LiCOW collaboration </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Observations of multiply imaged quasars, independent of the cosmic distance ladder and independent of the cosmic microwave background measurements. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2018-07-18 </td><td class="highlighted"  colspan=1 rowspan=1 > 67.66±0.42 </td><td class="highlighted"  colspan=1 rowspan=1 > Planck Mission </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Final Planck 2018 results. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018-04-27 </td><td colspan=1 rowspan=1 > 73.52±1.62 </td><td colspan=1 rowspan=1 > Hubble Space Telescope and Gaia </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Additional HST photometry of galactic Cepheids with early Gaia parallax measurements. The revised value increases tension with CMB measurements at the 3.8σ level. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018-02-22 </td><td colspan=1 rowspan=1 > 73.45±1.66 </td><td colspan=1 rowspan=1 > Hubble Space Telescope </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Parallax measurements of galactic Cepheids for enhanced calibration of the distance ladder; the value suggests a discrepancy with CMB measurements at the 3.7σ level. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017-10-16 </td><td colspan=1 rowspan=1 > 70.0+12.0 −8.0 </td><td colspan=1 rowspan=1 > The LIGO Scientific Collaboration and The Virgo Collaboration </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Measurement was independent of a cosmic ‘distance ladder'; the gravitational-wave analysis of a binary neutron star (BNS) merger GW170817 directly estimated the luminosity distance out to cosmological scales. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016-11-22 </td><td colspan=1 rowspan=1 > 71.9+2.4 −3.0 </td><td colspan=1 rowspan=1 > Hubble Space Telescope </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Uses time delays between multiple images of distant variable sources produced by strong gravitational lensing. Collaboration known as Lenses in COSMOGRAIL's Wellspring (H0LiCOW). </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016-08-04 </td><td colspan=1 rowspan=1 > 76.2+3.4 −2.7 </td><td colspan=1 rowspan=1 > Cosmicflows-3 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Comparing redshift to other distance methods, including Tully–Fisher, Cepheid variable, and Type Ia supernovae. A restrictive estimate from the data implies a more precise value of 75±2. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016-07-13 </td><td colspan=1 rowspan=1 > 67.6+0.7 −0.6 </td><td colspan=1 rowspan=1 > SDSS-III Baryon Oscillation Spectroscopic Survey </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Baryon acoustic oscillations. An extended survey (eBOSS) began in 2014 and is expected to run through 2020. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016-05-17 </td><td colspan=1 rowspan=1 > 73.24±1.74 </td><td colspan=1 rowspan=1 > Hubble Space Telescope </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Type Ia supernova, the uncertainty is expected to go down by a factor of more than two with upcoming Gaia measurements and other improvements. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2015-02 </td><td colspan=1 rowspan=1 > 67.74±0.46 </td><td colspan=1 rowspan=1 > Planck Mission </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Results from an analysis of Planck's full mission were made public on 1 December 2014 at a conference in Ferrara, Italy. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2013-10-01 </td><td colspan=1 rowspan=1 > 74.4±3.0 </td><td colspan=1 rowspan=1 > Cosmicflows-2 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Comparing redshift to other distance methods, including Tully–Fisher, Cepheid variable, and Type Ia supernovae. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2013-03-21 </td><td colspan=1 rowspan=1 > 67.80±0.77 </td><td colspan=1 rowspan=1 > Planck Mission </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > The ESA Planck Surveyor was launched in May 2009. Over a four-year period, it performed a significantly more detailed investigation of cosmic microwave radiation than earlier investigations using HEMT radiometers and bolometer technology to measure the CMB at a smaller scale than WMAP. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012-12-20 </td><td colspan=1 rowspan=1 > 69.32±0.80 </td><td colspan=1 rowspan=1 > WMAP (9 years), combined with other measurements. </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > 70.4+1.3 −1.4 </td><td colspan=1 rowspan=1 > WMAP (7 years), combined with other measurements. </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > These values arise from fitting a combination of WMAP and other cosmological data to the simplest version of the ΛCDM model. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > 71.0±2.5 </td><td colspan=1 rowspan=1 > WMAP only (7 years). </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009-02 </td><td colspan=1 rowspan=1 > 70.5±1.3 </td><td colspan=1 rowspan=1 > WMAP (5 years), combined with other measurements. </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009-02 </td><td colspan=1 rowspan=1 > 71.9+2.6 −2.7 </td><td colspan=1 rowspan=1 > WMAP only (5 years) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > 70.4+1.5 −1.6 </td><td colspan=1 rowspan=1 > WMAP (3 years), combined with other measurements. </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2006-08 </td><td colspan=1 rowspan=1 > 76.9+10.7 −8.7 </td><td colspan=1 rowspan=1 > Chandra X-ray Observatory </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Combined Sunyaev–Zel'dovich effect and Chandra X-ray observations of galaxy clusters. Adjusted uncertainty in table from Planck Collaboration 2013. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2001-05 </td><td colspan=1 rowspan=1 > 72±8 </td><td colspan=1 rowspan=1 > Hubble Space Telescope Key Project </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > This project established the most precise optical determination, consistent with a measurement of H0 based upon Sunyaev–Zel'dovich effect observations of many galaxy clusters having a similar accuracy. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > after 1996 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > before 1996 </td><td colspan=1 rowspan=1 > 50–90 (est.) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > early 1970s </td><td colspan=1 rowspan=1 > ~55 (est.) </td><td colspan=1 rowspan=1 > Allan Sandage and Gustav Tammann </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1958 </td><td colspan=1 rowspan=1 > 75 (est.) </td><td colspan=1 rowspan=1 > Allan Sandage </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > This was the first good estimate of H0, but it would be decades before a consensus was achieved. </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1956 </td><td colspan=1 rowspan=1 > 180 </td><td colspan=1 rowspan=1 > Humason, Mayall and Sandage </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1929 </td><td colspan=1 rowspan=1 > 500 </td><td colspan=1 rowspan=1 > Edwin Hubble, Hooker telescope </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1927 </td><td colspan=1 rowspan=1 > 625 </td><td colspan=1 rowspan=1 > Georges Lemaître </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > First measurement and interpretation as a sign of the expansion of the universe </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What values of the Hubble constant were found by the Planck Mission and the Hubble Space Telescope?
Answer:
The Planck mission published in 2018 indicated a value of 67.66±0.42 and in 2019, a value of 74.03±1.42 has been determined using the Hubble Space Telescope.