Year	PPG (TDS, current US$)
1979	2000
1980	1070095
1981	1347245
1982	2024999.6
1983	2536696.3
1984	3051105.2
1985	2797582.3
1986	1341232.9
1987	3036281.4
1988	2154445.9
1989	5168935.9
1990	2331674.4
1991	1542129.8
1992	2142495.3
1993	1866577.4
1994	2383088.7
1995	1755637.5
1996	2715932.2
1997	3180461.4
1998	3291926.2
1999	3988268.8
2000	3407108.4
2001	2942447.7
2002	3526012.6
2003	4429796.5
2004	6489695.7
2005	6472224
2006	6406904.2
2007	5393550.4
2008	2054543.1
2009	2053761.7
2010	1455327.8
2011	1441785.1
2012	11316770
2013	5224589.5
2014	12657024.7
2015	1753458.7
2016	1774944.4
2017	3264299.9
2018	3980587.2
2019	8204524.5
2020	2457285.1
2021	2573090.2
2022	7032409.2