Year	PPG (TDS, current US$)
1970	5639100
1971	5005299.9
1972	8797980.1
1973	13112677.3
1974	13983500.7
1975	17037700.3
1976	35448854.9
1977	35072704.6
1978	52059120.1
1979	94724123.2
1980	75438071.2
1981	80406761.5
1982	45386438.7
1983	47033473.3
1984	34957655.6
1985	30110627.7
1986	29491556.9
1987	26207244.3
1988	22854629.4
1989	43395765.6
1990	142141205.5
1991	93008991.3
1992	86366374.6
1993	83368766.2
1994	71237962.5
1995	81930973.4
1996	77876426.1
1997	102436924.8
1998	110207987.5
1999	60896837.8
2000	48438483.9
2001	36855035.4
2002	52835796.4
2003	48009519.5
2004	39976399.5
2005	25293175.1
2006	29242464.8
2007	24992161.8
2008	26369538
2009	18550505.1
2010	27135270.4
2011	33132240.4
2012	132722680
2013	35170717.9
2014	39475625.7
2015	45604825
2016	49702078
2017	57736252.4
2018	77003683.6
2019	77051511.2
2020	76453687.6
2021	79447781.9
2022	83723686.7