Year	PPG (TDS, current US$)
1970	344951
1971	410318
1972	480187.8
1973	140749
1974	471540.6
1975	413915.7
1976	958595.4
1977	1321602.3
1978	1775070.5
1979	1947620.5
1980	4247182.7
1981	4346731.1
1982	4573937.8
1983	7438344.2
1984	9780619.8
1985	13578002.2
1986	15483413.2
1987	18611205.4
1988	17012554.3
1989	21449894.2
1990	15023679.5
1991	17644837.4
1992	15103275
1993	15445150.6
1994	3217524.2
1995	19693938
1996	15185922.5
1997	17314481
1998	14756793.5
1999	20236285.3
2000	21577212.4
2001	16459305.5
2002	15200648.9
2003	19717960.4
2004	25141819.1
2005	23331358.7
2006	25634552
2007	22639407.7
2008	14142124.9
2009	11018440.3
2010	13932398.1
2011	18308723.6
2012	20628199.6
2013	37345344.4
2014	52880983.8
2015	56573861
2016	64754950.2
2017	73330491.3
2018	80298880.4
2019	87219175.6
2020	113329991.2
2021	461272692.3
2022	166227837.4