Year	PPG (TDS, current US$)
1973	10213356.9
1974	25586671.3
1975	74956712.3
1976	65656665.9
1977	77719789.9
1978	97363152.3
1979	92616068.8
1980	76089037.5
1981	107541177.1
1982	125970371.2
1983	134611362.2
1984	164747155.4
1985	191287305.8
1986	242249847.3
1987	298817095.2
1988	350608635.1
1989	334258099.6
1990	479062821.7
1991	418726248.3
1992	423590067.1
1993	412849092.9
1994	469496820.6
1995	678116158.6
1996	555815697.6
1997	547247073.1
1998	509352086
1999	575368714.7
2000	654049759.7
2001	582951423.4
2002	604603723.2
2003	571263486.9
2004	627199811
2005	773693148.8
2006	649184268.3
2007	909238745.4
2008	834217381
2009	896557161
2010	918890219.3
2011	1202021101.5
2012	1269637787.4
2013	1541616512
2014	1609835333.8
2015	1295351568.6
2016	1228505951.6
2017	1487362464.8
2018	1708275873.9
2019	1906617304.5
2020	2014023225.2
2021	2778837174.5
2022	3401739185