Year	current US$
1970	2637.005246889855
1971	2804.57853948022
1972	3157.673766501563
1973	3795.395779728834
1974	5072.507221437758
1975	5571.159272364478
1976	5514.2932795987745
1977	5435.385250036958
1978	5536.950919015181
1979	5857.0168434836
1980	6148.935722942059
1981	6720.79522417263
1982	6892.302222258364
1983	6184.766736126605
1984	5829.320755042291
1985	4998.044100596825
1986	4683.873671924237
1987	4580.250014117295
1988	5091.014623614497
1989	5774.423604526258
1990	5789.995359984088
1991	5305.371496326823
1992	5048.190653118037
1993	4257.978510837754
1994	3868.260778838315
1995	3874.5352820575777
1996	3620.9571013978293
1997	3602.38418200659
1998	2858.673116109003
1999	2632.053607637123
2000	2595.2568510070546
2001	2182.1178750272484
2002	2030.4727667089428
2003	2395.4137258955866
2004	2959.6096563941373
2005	2914.38903520579
2006	2836.638759378146
2007	2217.490229761943
2008	3671.020670769033
2009	4317.03757932603
2010	4644.355493645647
2011	6328.102672247027
2012	9675.959685042093
2013	8825.978580754083
2014	9063.002230359534
2015	7587.254410388886
2016	8528.630150870444
2017	9361.037396589189
2018	10985.874396503667
2019	10316.52782293263
2020	10124.700622094511
2021	14018.885835794088
2022	12142.769929785036
2023	12060.07810591091