Year	PPG (TDS, current US$)
1970	9428900
1971	10428098.8
1972	11431172.9
1973	16147891.4
1974	14545263.8
1975	7948809.9
1976	7388741.7
1977	5927940.3
1978	8369053.3
1979	14559686.7
1980	49880187.5
1981	65281441.3
1982	140176201
1983	435432019.7
1984	273762502.2
1985	322843512.4
1986	339584973.6
1987	375071551.4
1988	409513271.4
1989	346541570.2
1990	371629927.1
1991	361389045.5
1992	474570958.9
1993	483896547.9
1994	434275986.2
1995	478622035.1
1996	464920252.1
1997	445846332.6
1998	420972600.2
1999	460621045.3
2000	214398370.7
2001	44623014.3
2002	9498247
2003	35523407.3
2004	72429392.1
2005	34891416.4
2006	13626199.8
2007	48927490.8
2008	7749743.2
2009	14174858.6
2010	15529950.6
2011	22151935.8
2012	20746107.3
2013	120643125
2014	136822149.9
2015	157051919.5
2016	154906794.1
2017	141618680.8
2018	89374387.3
2019	69139939
2020	42647902.1
2021	109832244.2
2022	32105899.2