Year	current US$
1980	-2410140.908888238
1981	-2298412.0271304557
1982	-2059511.6485978845
1983	-1741313.8909833026
1984	-2355314.964493627
1985	-2025977.0780953385
1986	-2871088.142405972
1987	-4991783.524318971
1988	-4801881.569274104
1989	-5668830.415629925
1990	-4745365.656127869
1991	-6262086.748319366
1992	-6488849.424541512
1993	-8156266.53800679
1994	-8203300.886746444
1995	-4991338.559558413
1996	-3925573.3720507026
2002	-148175.10504133196
2012	-16437343.741566343
2013	-12242994.685800796
2014	-17178857.395823516
2015	-366407.3218796089
2016	18205487.488728516
2017	20982859.98283336
2018	29474989.32726229
2019	36618792.2552172
2020	-32045143.717964754
2021	-28069378.437611572
2022	-16320216.628498288