Year	PPG (TDS, current US$)
1970	2711026.3
1971	359556.8
1972	439163.4
1973	632292.4
1974	946788.9
1975	1838286.9
1976	1890736.6
1977	2917365
1978	2725958.7
1979	3281004.7
1980	3976909.5
1981	4718129.9
1982	5758978.2
1983	7692094.1
1984	9502397.5
1985	13235445.4
1986	22216296
1987	28448573.3
1988	41020227.2
1989	49364521.9
1990	51627518.7
1991	54183992.9
1992	61441732.8
1993	63074608.3
1994	71361888.2
1995	74285286.8
1996	68949929.4
1997	83400509.6
1998	80026100
1999	99397400
2000	95222761.4
2001	88211308
2002	96750682.2
2003	109619496.8
2004	115131411.8
2005	115921076.9
2006	134221818.5
2007	142207495.3
2008	159840079.2
2009	171888510.2
2010	180763093.5
2011	188844616.6
2012	207943449.1
2013	200889726.6
2014	206182778.2
2015	197412355.2
2016	205023077.9
2017	208359729.7
2018	214925166
2019	245626826.2
2020	258601860.4
2021	276417176
2022	309226778