Sentence:  <table class="wikitable"><tr><td>Qualification structure of the workforce (%)</td><td>"1980"</td><td>"1997"</td></tr><tr><td>    Blue-collar</td><td align="center">29.7</td><td align="center">33.5</td></tr><tr><td>    <WSD>Green-collar</WSD></td><td align="center">21.2</td><td align="center">10.0</td></tr><tr><td>    White-collar</td><td align="center">25.0</td><td align="center">31.7</td></tr><tr><td>    Grey-collar</td><td align="center">24.0</td><td align="center">24.8</td></tr></table> 
Meaning of the word marked with <WSD> tags:  Of or pertaining to rural, agricultural employment; "often contrasted with" urban blue-collar employment.