Year	current US$
1972	5710430.405713118
1973	6602131.491515947
1974	7958199.707697176
1975	8828629.752667835
1976	8661404.744268445
1977	7911760.309570808
1978	7898433.411317329
1979	8468933.675104272
1980	9110014.379193151
1981	9721742.07054282
1982	8052939.606224717
1983	8402857.16372786
1984	8862625.265011786
1985	8217500.971820289
1986	9945081.824939225
1987	11090900.551057199
1988	14106673.943313558
1989	14906606.924625613
1990	18701562.085029524
1991	20561222.143159457
1992	21822107.87664204
1993	20229193.767562386
1994	23241356.354588017
1995	22744347.57293842
1996	21999620.408253223
1997	26842940.113415074
1998	27783591.136750594
1999	25777992.20319167
2000	22200100.46162555
2001	26689802.3490303
2002	32966562.75909371
2003	25358454.41893698
2004	33183331.80501956
2005	37295344.26873337
2006	39421113.08577556
2007	47560228.52432663
2008	49336529.54633828
2009	50989093.38060009
2010	47577922.24651771
2011	50905545.84196664
2012	48573602.93866118
2013	61688413.12557736
2014	52207205.883738816
2015	61921107.82515093
2016	59563672.52039328
2017	57885312.33620606
2018	66944030.262471266
2019	72821244.4884593
2020	71588477.12850037
2021	76523799.56367561
2022	80937989.3563625
2023	86040855.40748394