Year	PPG (TDS, current US$)
1970	40193220.5
1971	44765356.8
1972	57610224.7
1973	71505696.1
1974	114466471.3
1975	129862943.4
1976	179987086.4
1977	269165609.1
1978	395373848.3
1979	588306754.2
1980	870122899.1
1981	919104984.5
1982	948177192.2
1983	789905541.7
1984	646106746
1985	594524762.2
1986	800587717.3
1987	577267746.5
1988	456832709.8
1989	396115136
1990	523996772.5
1991	618101922.2
1992	558991369.2
1993	570883340.2
1994	692854518.4
1995	771065445.8
1996	850139582.3
1997	601310320.4
1998	885798762.7
1999	991783763.6
2000	670723390
2001	303050976.9
2002	505107324.2
2003	300696357
2004	94891764.9
2005	23533584.7
2006	16299161.4
2007	153057506.4
2008	769533754.8
2009	773820091.3
2010	496704984
2011	414642186.4
2012	299555640.7
2013	529421936.5
2014	593766451.3
2015	398074927
2016	1040551275
2017	1747026137
2018	1108625399.6
2019	2463260794.2
2020	1897276845.9
2021	1287364577.1
2022	1645188992.2