 The Sarnia @-@ Lambton Workforce Development Board states in its March 2011 Labour Market Report that : " Even though employment in both the petrochemical and agricultural industries has declined significantly in recent years , these two industries remain central drivers of the Sarnia Lambton economy . " 
 The Sarnia @-@ Lambton Workforce Development Board <a href='uninflect' title='1'><mark>states</mark></a> in its March 2011 Labour Market Report that : " Even though employment in both the petrochemical and agricultural industries <a href='been_done' title='2'><mark>has</mark></a> declined significantly in recent years , these two industries remain central drivers of the Sarnia Lambton economy . " 
Da Sarnia @-@ Lambton Workforce Development Board state in its March 2011 Labour Market Report that : " Even though employment in both the petrochemical and agricultural industries done declined significantly in recent yrs , these 2 industries remain central drivers of tdaSarnia Lambton economy . "