Year	PPG (TDS, current US$)
1970	3529222
1971	3658941.7
1972	10875825.9
1973	12693297.8
1974	14041909.6
1975	39600696
1976	77412851.4
1977	40953558.9
1978	26149997.9
1979	65910514.9
1980	29813382.6
1981	53868590.1
1982	38293621.2
1983	36877362.9
1984	41797287.3
1985	75579091.1
1986	74311513.8
1987	98277601.2
1988	111426895.6
1989	80068878.6
1990	117564623.4
1991	73376668.5
1992	72289843.3
1993	117821255.6
1994	95472333.8
1995	102035622.9
1996	101779821.3
1997	97472834.6
1998	94106130.7
1999	88222849.5
2000	65510231.2
2001	61000815.5
2002	43523414.2
2003	44253901.5
2004	43967792.5
2005	52231482.1
2006	63321932.7
2007	115619083.1
2008	59150883.3
2009	77017805.5
2010	112245192.2
2011	124186108
2012	148717050.8
2013	166098088.9
2014	238494893
2015	235642987
2016	247517377
2017	303957453.8
2018	362154377.6
2019	354759160.8
2020	269430624.6
2021	392885556.4
2022	326346881.2