Year	PPG (TDS, current US$)
1970	149880396.7
1971	178066790.3
1972	193583790.4
1973	412199551.1
1974	448853188
1975	456328287.9
1976	468592532
1977	659887421.5
1978	769406210.8
1979	944590414.2
1980	1520795110.3
1981	1911628234.1
1982	1535242461.3
1983	775094984.9
1984	702644489
1985	726927099.4
1986	501105617.1
1987	370060856.4
1988	228896776.1
1989	269258610
1990	179461034.2
1991	908366919.6
1992	745263194.2
1993	1708826588.8
1994	943554969.3
1995	904721304
1996	2398209538.4
1997	2834614702
1998	1551882380.2
1999	2005150203.7
2000	2091658459.9
2001	1753430548.6
2002	3099849316.8
2003	2218320507.7
2004	2447714821.7
2005	4440196669.7
2006	2538583477.4
2007	7378677503
2008	3802692312.6
2009	2916650584.2
2010	4585583413.8
2011	1892972629.7
2012	2317684670.8
2013	3799284016.6
2014	1887187622.7
2015	1717671528.3
2016	1856126634
2017	4714606555.4
2018	2244532500.1
2019	2334533114.4
2020	1209305273.1
2021	1504883050.3
2022	2264923920