Year	current US$
1995	1638820673.8992157
1996	1906890475.1595397
1997	1843659706.26449
1998	2341001221.469867
1999	2602932916.006256
2000	2520172003.985982
2001	2886449385.7614493
2002	3117779149.4416575
2003	3618620352.339232
2004	4173652439.5903974
2005	5483667108.855904
2006	6115568443.859146
2007	7596372174.747651
2008	8381375135.561505
2009	7981388497.795934
2010	8136328499.879689
2011	9759762349.433056
2012	11243989689.189928
2013	11693811708.63289
2014	12387105471.39385
2015	11957369864.75132
2016	12651693466.418839
2017	13065847802.158142
2018	14925233625.756195
2019	15280851378.202814