Year	PPG (TDS, current US$)
1970	2723660
1971	1481282.6
1972	2396857.5
1973	3449460.5
1974	6871749.3
1975	7336120.4
1976	8491392.5
1977	9721918.6
1978	18336650.2
1979	13858226.1
1980	20695093.7
1981	26080669.6
1982	34154286.9
1983	37507087.6
1984	51004530.7
1985	55805953.7
1986	56522391.3
1987	62676422.8
1988	61608733.5
1989	63132647.3
1990	78613875.7
1991	78566881.3
1992	59449820.9
1993	52874778.2
1994	66274311.6
1995	42505722.7
1996	28698316.5
1997	19444198.3
1998	21784971.1
1999	28734120.8
2000	25425586.9
2001	17519758.5
2002	18109180
2003	17160524.6
2004	11641359
2005	14029256
2006	13603553.7
2007	27354613.2
2008	24822308.8
2009	26723931.7
2010	24378319.1
2011	190633452.5
2012	40180475.1
2013	45328129.6
2014	50534011.7
2015	315502291.7
2016	71267341.2
2017	56747347.2
2018	65493073.2
2019	184010771.5
2020	255513441
2021	24018991
2022	103513297.4