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:
London Calling (song)
Table title:
Reissues
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > B-side </th><th colspan=1 rowspan=1 > Format </th><th colspan=1 rowspan=1 > Label </th><th colspan=1 rowspan=1 > Country </th><th colspan=1 rowspan=1 > Note </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1979 </td><td colspan=1 rowspan=1 > "Armagideon Time" </td><td colspan=1 rowspan=1 > 45 rpm 7" vinyl </td><td class="highlighted"  colspan=1 rowspan=1 > CBS S CBS 8087 </td><td colspan=1 rowspan=1 > UK </td><td colspan=1 rowspan=1 > Released on 7 December 1979; No. 2 for 1979, No. 37 overall. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1979 </td><td colspan=1 rowspan=1 > "Justice Tonight" (Version) "Kick It Over" (Version) </td><td colspan=1 rowspan=1 > 45 rpm 12" vinyl </td><td class="highlighted"  colspan=1 rowspan=1 > CBS 128087 </td><td colspan=1 rowspan=1 > UK </td><td colspan=1 rowspan=1 > A-side: "London Calling" "Armagideon Time". </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1979 </td><td colspan=1 rowspan=1 > "Armagideon Time" </td><td colspan=1 rowspan=1 > 45 rpm 7" vinyl </td><td class="highlighted"  colspan=1 rowspan=1 > CBS S CBS 8087 </td><td colspan=1 rowspan=1 > UK </td><td colspan=1 rowspan=1 > Alternate cover. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1979 </td><td colspan=1 rowspan=1 > "Armagideon Time" </td><td colspan=1 rowspan=1 > 45 rpm 7" vinyl </td><td class="highlighted"  colspan=1 rowspan=1 > CBS 8087 </td><td colspan=1 rowspan=1 > NL </td><td colspan=1 rowspan=1 > — </td></tr>
<tr> <td colspan=1 rowspan=1 > 1980 </td><td colspan=1 rowspan=1 > "London Calling" </td><td colspan=1 rowspan=1 > 45 rpm 7" vinyl </td><td colspan=1 rowspan=1 > Epic 50851 </td><td colspan=1 rowspan=1 > USA </td><td colspan=1 rowspan=1 > A-side: "Train in Vain (Stand by Me)". Released on 12 February 1980. </td></tr>
<tr> <td colspan=1 rowspan=1 > 1988 </td><td colspan=1 rowspan=1 > "Brand New Cadillac" "Rudie Can't Fail" </td><td colspan=1 rowspan=1 > 45 rpm 7" vinyl </td><td colspan=1 rowspan=1 > CBS CLASH 2 </td><td colspan=1 rowspan=1 > UK </td><td colspan=1 rowspan=1 > Boxed Set; Limited Edition </td></tr>
<tr> <td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > "Brand New Cadillac" "Return to Brixton" (Jeremy Healy 7" Remix) </td><td colspan=1 rowspan=1 > 45 rpm 12" vinyl </td><td colspan=1 rowspan=1 > Columbia 31-656946-22 </td><td colspan=1 rowspan=1 > UK </td><td colspan=1 rowspan=1 > — </td></tr>
<tr> <td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > "Brand New Cadillac" </td><td colspan=1 rowspan=1 > 45 rpm 7" vinyl </td><td colspan=1 rowspan=1 > Columbia 656946 </td><td colspan=1 rowspan=1 > UK </td><td colspan=1 rowspan=1 > — </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=1 > "London Calling (2012 instrumental)" </td><td colspan=1 rowspan=1 > 45 rpm 7" vinyl </td><td colspan=1 rowspan=1 > Columbia 88691959247 </td><td colspan=1 rowspan=1 > USA </td><td colspan=1 rowspan=1 > New 2012 mix by Mick Jones and Bill Price. Released 2012/04/21 </td></tr>
</table>
Question:
How many of the songs are from 1979?
Answer:
Four are from 1979 (catalogue number: 8087; S CBS 8087; 128087; S CBS 8087).