Year	US Dollars
1978	144410003.66211
1985	13829999.92371
1986	11260000.22888
1987	28690000.53406
1988	15140000.34332
1989	14100000.38147
1990	11739999.77112
1991	12630000.11444
1992	14479999.54224
1993	19540000.91553
1994	7650000.09537
1995	16440000.53406
1996	33470001.2207
1997	129020004.27246
1998	153470001.2207
1999	298609985.35156
2000	119489997.86377
2001	196360000.61035
2002	391320007.32422
2003	174149993.89648
2004	198639999.38965
2005	101769996.64307
2006	61869998.93188
2007	107160003.66211
2008	231399993.89648
2009	67319999.69482
2010	79160003.66211
2011	103349998.47412
2012	86800003.05176
2013	92370002.74658
2014	127669998.16894
2015	138149993.89648
2016	130449996.94824
2017	132289993.28613
2018	115000000
2019	128720001.2207
2020	124089996.33789
2021	17090000.15259