Year	TDS, current US$
1970	1934000
1971	2896000
1972	3955000
1973	4759000
1974	5295000
1975	6562000
1976	8254000
1977	11240000
1978	17231670.5
1979	22786596.5
1980	28723992.6
1981	31009429.1
1982	41308204.9
1983	53042750.7
1984	69675314.6
1985	75515554.1
1986	106171333
1987	146072162.2
1988	161353634.9
1989	162020723.1
1990	188006975.7
1991	194603301.6
1992	220819981.4
1993	208123877.9
1994	205304305.2
1995	211163331.4
1996	200127888.2
1997	207128399.8
1998	172894425.5
1999	174810179.4
2000	188385348.4
2001	181027326.4
2002	176892005.9
2003	187366366.5
2004	181933601
2005	180965209.7
2006	204858597.2
2007	224310774.2
2008	210786852.5
2009	213612726.8
2010	187758160.2
2011	185802820.4
2012	210808225.6
2013	221664594.3
2014	181516094.9
2015	189258878.7
2016	237373282.7
2017	253665097.6
2018	263418967.1
2019	297258711.3
2020	260230346.8
2021	258518646.7
2022	261239988.6