Year	PPG (TDS, current US$)
1970	2367404
1971	2423047.3
1972	5289591.3
1973	6619978.9
1974	8547030.6
1975	16587053.5
1976	23002292.4
1977	56712966.9
1978	47686381.9
1979	28196930.6
1980	37855977.9
1981	70833103.5
1982	70292284.5
1983	49777404.8
1984	74614857.8
1985	90041342.1
1986	126956199.4
1987	61163901.7
1988	93523711.1
1989	57310526.9
1990	60040563.5
1991	38501551.9
1992	19327993.2
1993	12962432.6
1994	12100245.5
1995	14048155.1
1996	43628687.6
1997	41550070.2
1998	25777551.1
1999	27637745.5
2000	14577797.2
2001	18640010.7
2002	2512177.7
2003	3175905.1
2004	4345417.7
2005	8292355.8
2006	17222125.1
2007	5307867.2
2008	191352574.3
2009	52612914.4
2010	35802448.2
2011	14810102
2012	22650234.8
2013	49258040.1
2014	47525107
2015	43538830.4
2016	65213706.7
2017	74621769.3
2018	81697203.2
2019	86527406.7
2020	85841643
2021	107750909.1
2022	176854879.5