Year	current US$
1999	276638442.572457
2000	285296007.050442
2001	189155431.279524
2002	137851621.983006
2003	142674569.772822
2004	139092209.872241
2005	141728184.421074
2006	94296932.7498449
2007	96663319.8613195
2008	91314450.4415403
2009	90058008.356833
2010	105412462.955525
2011	196798215.663923
2012	166815679.075574
2013	176833871.512583
2014	168288844.920419
2015	144019727.027575
2016	414179630.933144
2017	353143988.78648096
2018	371418617.768445