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:
Conventional electrical unit
Table title:
Definition
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Constant </th><th colspan=1 rowspan=1 > Conventional exact value (CIPM, 1988; until 2018) </th><th colspan=1 rowspan=1 > Empirical value (in SI units) (CODATA, 2014) </th><th colspan=1 rowspan=1 > Exact value (SI units, 2019) </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Josephson constant </td><td class="highlighted"  colspan=1 rowspan=1 > KJ-90 = 483597.9 GHz/V </td><td colspan=1 rowspan=1 > KJ = 483597.8525(30) GHz/V </td><td colspan=1 rowspan=1 > KJ = 2 × 1.602176634×10−19 C/6.62607015×10−34 J⋅s </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > von Klitzing constant </td><td class="highlighted"  colspan=1 rowspan=1 > RK-90 = 25812.807 Ω </td><td colspan=1 rowspan=1 > RK = 25812.8074555(59) Ω </td><td colspan=1 rowspan=1 > RK = 6.62607015×10−34 J⋅s/(1.602176634×10−19 C)2 </td></tr>
</table>
Question:
In 1988, what was the official value for the KJ-90 and the von Klitzing constants?
Answer:
In 1988, the CIPM conventional values for the Josephson constant as exactly KJ-90 = 483597.9×10⁹ Hz/V and for the von Klitzing constant as exactly RK-90 = 25812.807 Ω.