Year	current US$
1990	2259852.6060901275
1991	2263670.0432169354
1992	2256824.0837573293
1993	2270563.5948210205
1994	2567718.831863402
1995	2650787.63825644
1996	3206525.269140745
1997	3133859.787142454
1998	2777247.290536415
1999	2834828.053422801
2000	2462855.695092899
2001	2416674.5110533442
2002	2685156.6613041773
2003	3169437.465383932
2004	4023380.7341338713
2005	4452172.744302479
2006	5219232.619940314
2007	6281629.893429016
2008	6696986.523824463
2009	6552856.092198576
2010	8512519.733359996
2011	10123130.021465492
2012	7721466.430455135
2013	7342618.524235815
2014	7071625.7888536025
2015	5859107.949124401