Year	PPG (TDS, current US$)
1970	2940088.7
1971	6711465.6
1972	4280120
1973	3271181
1974	3269074.4
1975	6436976.7
1976	4441385.3
1977	3449641.1
1978	3123049.7
1979	2009389.6
1980	2670948.8
1981	610000
1982	1204802.2
1983	358250.3
1984	3341427.1
1985	12440658.7
1986	5001408.2
1987	5508275.5
1988	6691111.3
1989	5071595.7
1990	6270412.8
1991	8281539.2
1992	8048213.2
1993	10760795.7
1994	12992630.1
1995	6856741.3
1996	20162368
1997	19714630.5
1998	17200494.1
1999	22805089.8
2000	22212345.4
2001	18125431.9
2002	18778539
2003	26749623.7
2004	24913171.9
2005	40038328
2006	40369349.7
2007	52349641.6
2008	122679544.6
2009	64644368.4
2010	61736120.2
2011	74701759.6
2012	79500238.8
2013	116708538.8
2014	588018693.4
2015	100210963.1
2016	161381858.2
2017	166132907.3
2018	176305058.4
2019	132423411.6
2020	185320677.1
2021	318855018.1
2022	219691162.2