Year	PPG (TDS, current US$)
1970	211559119.29999998
1971	226177345.00000003
1972	272265834
1973	358799426.29999995
1974	451955238.99999994
1975	483153541.2
1976	365233093.6
1977	548044746.4999999
1978	502451405.70000005
1979	588578037.3000002
1980	966784495.5999997
1981	991191976.7000002
1982	875606332.3000002
1983	789324916.4000001
1984	991952050.1
1985	1178556734.3000002
1986	1519397076.8000002
1987	1390552329.1
1988	1548673147.6999998
1989	1396027968.1999998
1990	1147705049.4999998
1991	1070895676.6
1992	827198247.9
1993	875143034.1000003
1994	849976905.6999998
1995	973728224.4
1996	1112980419.7
1997	911590052.4000001
1998	914322045.7
1999	930044661.4000001
2000	942466133.5
2001	942929811.5
2002	1116527898.9
2003	1076080908.5
2004	1237515366.2
2005	1387543047.4000003
2006	1480575822.5
2007	2138094317.5
2008	2539564924.0999994
2009	2449310335.900001
2010	2276444238.3
2011	2541472247.100001
2012	1954229971.1000001
2013	2608274308.3
2014	3390298827.7999997
2015	3517567790.400001
2016	3275078414
2017	3562615190.4
2018	3971676555.7
2019	5369143737.5
2020	5139685271.4
2021	7179082034.500001
2022	6051880007.500001