Year	current US$
1980	629852.859937601
1981	720821.15018054
1982	782575.905729955
1983	831525.362723927
1984	880908.646073601
1985	929214.154151683
1986	969255.983119515
1987	1015571.37853059
1988	3225153.73689921
1989	3427001.79023221
1990	3635279.69718621
1991	3842776.05273521
1992	4018782.33599189
1993	4206607.05013843
1994	4393105.74301288
1995	4586142.36755349
1996	4775190.70685088
1997	4966830.14149128
1998	5135744.96178851
1999	5325302.25222625
2000	5568483.37739791
2001	5822052.27473475
2002	6045828.57963088
2003	8405153.15190598
2004	8824974.34859557
2005	9306498.49350797
2006	12261894.415705
2007	12094092.2807853
2008	13418869.8397774
2009	16570486.1907733
2010	17146945.5564875
2011	19097279.7341858
2012	18363982.1101823
2013	18793162.0697049
2014	19945971.8969383
2015	22153380.4543323
2016	22512701.9994385
2017	26862741.1975595
2018	26143898.6101725
2019	32957609.610868
2020	28748559.6714293
2021	32691674.2104105