Year	TDS, current US$
1970	3930000
1975	14574600
1976	12261267.9
1977	43657964.4
1978	3038304.3
1979	39706065.4
1980	16794221.8
1981	21477260.1
1982	42065937.2
1983	75181733.6
1984	98840764.1
1985	117457726.2
1986	156253196
1987	152808114
1988	129281560.7
1989	162741013.5
1990	131022004.8
1991	57840291.4
1992	93182535.4
1993	65814771.1
1994	15772736.8
1995	41168721.9
1996	62609681.2
1997	68785235.7
1998	63642361.7
1999	62598077.2
2000	45147385.9
2001	25282187.3
2002	19607900.1
2003	20869736.5
2004	15842977.5
2005	9795249.2
2006	16599315.6
2007	13261886.1
2008	12417703.5
2009	20823433.1
2010	26840461.8
2011	24089465.2
2012	28838903
2013	46104195.4
2014	58809751.3
2015	66136621.2
2016	67936330.2
2017	119104192.7
2018	146577525
2019	157310168.9
2020	137242190.3
2021	132752434.4
2022	92018280.4