Year	PPG (TDS, current US$)
1970	9041161.5
1971	13001909.8
1972	15256566.6
1973	24462364.2
1974	25300300.9
1975	35939088.3
1976	39343233.8
1977	57188713.7
1978	106756846.9
1979	135775048.1
1980	185853788.1
1981	206839476.5
1982	270455364.7
1983	210915343.4
1984	236289126.2
1985	250893584.9
1986	315546200.6
1987	336008622.9
1988	272275777
1989	167262751
1990	314514136
1991	271654692.1
1992	205320409.4
1993	305419806.8
1994	295671698
1995	345202954.9
1996	458236545.3
1997	419806149.3
1998	423155904.6
1999	345638403.4
2000	364453169.6
2001	202060527.7
2002	265852458.9
2003	303676255.6
2004	474301544.6
2005	573468811.4
2006	249139465.1
2007	251490581.2
2008	195987073
2009	140724651.9
2010	149118928
2011	190291553.7
2012	115483504.6
2013	146915442
2014	483166666
2015	385453343.8
2016	445272205.7
2017	415017281.9
2018	604168692.4
2019	666290532.4
2020	951862860.9
2021	798713694.5
2022	1655400603.6