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:
Bruce M. Fischer
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 colspan=1 rowspan=1 > 1971 </td><td colspan=1 rowspan=1 > A Town Called Hell </td><td colspan=1 rowspan=1 > Miguel </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td colspan=1 rowspan=1 > 1971 </td><td colspan=1 rowspan=1 > Doc </td><td colspan=1 rowspan=1 > Billy Clanton </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1971 </td><td colspan=1 rowspan=1 > Captain Apache </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1971 </td><td colspan=1 rowspan=1 > Man in the Wilderness </td><td colspan=1 rowspan=1 > Wiser </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1973 </td><td colspan=1 rowspan=1 > The Man Called Noon </td><td colspan=1 rowspan=1 > Ranch hand </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1974 </td><td colspan=1 rowspan=1 > Earthquake </td><td colspan=1 rowspan=1 > Man #1 </td><td colspan=1 rowspan=1 > Uncredited </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1976 </td><td class="highlighted"  colspan=1 rowspan=1 > The Outlaw Josey Wales </td><td colspan=1 rowspan=1 > Yoke </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1976 </td><td colspan=1 rowspan=1 > Baker's Hawk </td><td colspan=1 rowspan=1 > Blacksmith </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1979 </td><td colspan=1 rowspan=1 > Escape from Alcatraz </td><td colspan=1 rowspan=1 > Wolf </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1981 </td><td colspan=1 rowspan=1 > Back Roads </td><td colspan=1 rowspan=1 > Ezra </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1981 </td><td colspan=1 rowspan=1 > Take This Job and Shove It </td><td colspan=1 rowspan=1 > Jimmy </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1982 </td><td colspan=1 rowspan=1 > Flush </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1983 </td><td class="highlighted"  colspan=1 rowspan=1 > Something Wicked This Way Comes </td><td class="highlighted"  colspan=1 rowspan=1 > Mr. Cooger </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > City Heat </td><td colspan=1 rowspan=1 > Bruiser #1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1985 </td><td colspan=1 rowspan=1 > The Journey of Natty Gann </td><td colspan=1 rowspan=1 > Charlie Linfield </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1987 </td><td colspan=1 rowspan=1 > The Verne Miller Story </td><td colspan=1 rowspan=1 > Harry Adler </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1989 </td><td colspan=1 rowspan=1 > Real Men </td><td colspan=1 rowspan=1 > Steelworker </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1990 </td><td colspan=1 rowspan=1 > Grim Prairie Tales: Hit the Trail... to Terror </td><td colspan=1 rowspan=1 > Colochez </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > Everyman's War </td><td colspan=1 rowspan=1 > Judge </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > Birds of LA 17 </td><td colspan=1 rowspan=1 > Boris the Strangler </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
In what year was Bruce M. Fischer most active?
Answer:
In 1971 Bruce M. Fischer was most active, appearing in 4 films: A Town Called Hell, Doc, Captain Apache, and Man in the Wilderness.