Year	PPG (TDS, current US$)
1970	10968035.3
1971	17084486.8
1972	11988259.8
1973	23157165.5
1974	27102234.4
1975	57562805.3
1976	40130843.7
1977	74571923.6
1978	35644010.7
1979	38932735.7
1980	47053967.8
1981	52960581.7
1982	73444722.6
1983	162285824.6
1984	208083043.3
1985	209724745.4
1986	196477253.2
1987	200846164.2
1988	173001573.2
1989	141146912.3
1990	186077990.8
1991	237928548
1992	228927765.2
1993	295075867.4
1994	337707328.2
1995	264234086.9
1996	283469661.8
1997	237979223.4
1998	375091620.7
1999	253603470.8
2000	263652870
2001	308920411.6
2002	380318938.4
2003	499280437.4
2004	574944023.2
2005	527894690
2006	820274982.4
2007	715570344.6
2008	719940929.5
2009	934036604.7
2010	835711526.8
2011	1005584122.2
2012	862882541.6
2013	836719501.6
2014	874872410.4
2015	899602855.9
2016	969631503.1
2017	981859566.4
2018	1025149505.4
2019	1862511969.3
2020	1045327857
2021	1108912729
2022	1818643453.7