AI_CATEGORY YEAR LBS_AI ACRES TAC 1997 48857680 5089105 TAC 1998 47177111 5454430 TAC 1999 51314006 4610045 TAC 2000 42769837 4878041 TAC 2001 36940410 3355705 TAC 2002 43743587 3394764 TAC 2003 45499124 3742491 TAC 2004 45615545 3522709 TAC 2005 45546899 3661116 TAC 2006 44944754 3571082 TAC 2007 42899405 3116678 TAC 2008 43462210 2807846 TAC 2009 36970854 2578071 TAC 2010 43556940 2732296 TAC 2011 45631881 2542330 TAC 2012 49138952 2531503 TAC 2013 46823779 2381634 TAC 2014 44786393 2470562 TAC 2015 48008857 2502044 TAC 2016 45945544 2418651 TAC 2017 43001203 2269507