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:
Robert Urich
Table title:
Filmography
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Role </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1973 </td><td class="highlighted"  colspan=1 rowspan=1 > Magnum Force </td><td colspan=1 rowspan=1 > Officer Mike Grimes </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1982 </td><td colspan=1 rowspan=1 > Endangered Species </td><td colspan=1 rowspan=1 > Ruben Castle </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1984 </td><td class="highlighted"  colspan=1 rowspan=1 > The Ice Pirates </td><td colspan=1 rowspan=1 > Jason </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Invitation to Hell </td><td colspan=1 rowspan=1 > Matt Winslow </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1985 </td><td class="highlighted"  colspan=1 rowspan=1 > Turk 182 </td><td colspan=1 rowspan=1 > Terry Lynch </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1988 </td><td colspan=1 rowspan=1 > April Morning </td><td colspan=1 rowspan=1 > Joseph </td><td colspan=1 rowspan=1 > Credit at beginning only </td></tr>
<tr> <td colspan=1 rowspan=1 > 1989 </td><td colspan=1 rowspan=1 > Dragon Fight </td><td colspan=1 rowspan=1 > Airport Police </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1992 </td><td colspan=1 rowspan=1 > Jock: A True Tale of Friendship </td><td colspan=1 rowspan=1 > Rocky </td><td colspan=1 rowspan=1 > Alternative title: Jock of the Bushveld </td></tr>
<tr> <td colspan=1 rowspan=1 > 1992 </td><td colspan=1 rowspan=1 > Revolver </td><td colspan=1 rowspan=1 > Nick Clayton </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1994 </td><td colspan=1 rowspan=1 > Jock of the Bushveld </td><td colspan=1 rowspan=1 > Rocky Mountain Jack </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1996 </td><td colspan=1 rowspan=1 > Young Again </td><td colspan=1 rowspan=1 > Michael Riley, Age 40 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1996 </td><td colspan=1 rowspan=1 > The Angel of Pennsylvania Avenue </td><td colspan=1 rowspan=1 > Angus Feagan </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2002 </td><td colspan=1 rowspan=1 > Clover Bend </td><td colspan=1 rowspan=1 > Bill </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
In what decade was Robert Urich most prolific?
Answer:
From 1980 to 1989, Robert Urich was the most prolific, starring in six films: Endangered Species, The Ice Pirates, Invitation to Hell, Turk 182, April Morning, and Dragon Fight.