Year	PPG (TDS, current US$)
1970	13058903
1971	8542674.2
1972	10688502.3
1973	12851196.7
1974	14473991.9
1975	15538366.2
1976	22005339.5
1977	17120175.5
1978	37681385.3
1979	44574303.3
1980	57267428.4
1981	61303655.1
1982	30135703.1
1983	25402983.8
1984	27590282.9
1985	15486012.7
1986	14071132.6
1987	13699486.7
1988	17455158.6
1989	5748976.6
1990	16454095.4
1991	7362411.7
1992	26120058.1
1993	21322982.5
1994	40251036.4
1995	77260307.5
1996	60316606
1997	14239098.3
1998	24416889
1999	15301938
2000	18519447.6
2001	17331195.3
2002	13143053.1
2003	15616329.2
2004	18558195.4
2005	13860960.1
2006	18147560.3
2007	9410776.1
2008	5319829.4
2009	7071712.3
2010	8802201.6
2011	13031708.6
2012	13426698.4
2013	16970300.5
2014	22436272.5
2015	21541764.2
2016	32137523.1
2017	36368574.9
2018	36134645.1
2019	49999690.9
2020	50801420.9
2021	52123682.3
2022	62167448.3