Year	current US$
1990	51102688.7480646
1991	53463840.4434652
1992	55851652.2674167
1993	60224332.9083602
1994	64847970.6814567
1995	69190115.5937266
1996	71451854.6460641
1997	72230232.6032688
1998	73731915.9537447
1999	68191118.8576371
2000	65989634.5309184
2001	62998449.6714579
2002	58111659.956261
2003	57937277.8122096
2004	58223089.1154794
2005	59281773.0565097
2006	60961753.0774282
2007	62334334.1716919
2008	62881175.0071214
2009	66327255.2243832
2010	60558810.35883
2011	66878049.2451979
2012	64429201.2637567
2013	64913659.4178209
2014	66958749.4786413
2015	67633378.8082266
2016	65934204.046814
2017	62510767.7769554
2018	63384869.6891732
2019	63602766.3061532
2020	62644409.9273917
2021	66291540.8273771