Year	current US$
1974	3199357.030885664
1975	3019425.875728487
1976	2158303.151766097
1977	3940873.704030305
1978	5259455.206579899
1979	6875170.969959074
1980	5605181.47096378
1981	7364686.051476929
1982	9290560.686784437
1983	6535932.515118121
1984	8766115.98690768
1985	7627052.154833671
1986	9707426.50226541
1987	6956125.191929639
1988	7129676.09929352
1989	7405015.951825679
1990	7980000
1997	9398000
1998	7328120
1999	8430280.00000002
2000	9144477.14000002
2001	9503895.88031107
2002	9462003.40530427
2003	10755418.24090598
2004	12210112.399079999
2005	9711369.67796586
2006	15715108.78240646
2007	15229722.898579057
2008	18910428.028662868
2009	17285055.73262893
2010	21597656.70321907
2011	27468274.167998128
2012	24355613.569788348
2013	43476064.62877911
2014	77175919.33170533
2015	62025949.51429135
2016	60451279.45029477
2017	59291504.85927866
2018	58969837.81580795
2019	58007573.40032825
2020	40676275.9361718
2021	47175545.26055796
2022	51633705.73304775