Year	PPG (TDS, current US$)
1970	1395453940.6
1971	759055335.5
1972	842416673.2
1973	903001295
1974	1022945725
1975	1234372957.8
1976	1239067559.5
1977	1335661963.2
1978	1523140017.8000002
1979	1701514375.8000002
1980	1885950126.8000002
1981	1938033569.2
1982	2122372000.6
1983	2892876237.1
1984	2835143566.2999997
1985	3405723761.3
1986	4599482090.599999
1987	4798649181.3
1988	5266998066.7
1989	6291292743.599998
1990	7686737590.099999
1991	7838067762.9
1992	8437016349.9
1993	9284785767.3
1994	12055664750.800001
1995	13631740844.7
1996	13002396064.400002
1997	14746727204.900002
1998	12892829029.499998
1999	10973537462.9
2000	12716411313.1
2001	11632180013.099998
2002	15221994637.1
2003	21178696465.100002
2004	13755310737.599998
2005	18481509160.600002
2006	9438854863.8
2007	14129979191.2
2008	19338569191.100002
2009	11455786872.900002
2010	11614611379.9
2011	12806613050.500002
2012	13204608291.9
2013	16611541980.400002
2014	21430184441.800003
2015	21036371807.9
2016	30074522212.7
2017	25461474975.5
2018	35224541790.3
2019	33169631310.1
2020	40963000088.3
2021	34015872208.1
2022	37815785640.600006