Year	PPG (TDS, current US$)
1970	21138413.3
1971	20195259.5
1972	21391728.9
1973	22074834.4
1974	21117060.7
1975	25416769.9
1976	24142042.1
1977	25150245.1
1978	27132562.6
1979	28583034.5
1980	34231633.8
1981	44519922.9
1982	56291955.2
1983	72069685.2
1984	87221391.2
1985	110612715.9
1986	176736731.1
1987	217809549.5
1988	280545308.4
1989	269388327.8
1990	200871429.2
1991	124349547
1992	104426938.3
1993	89843627.7
1994	107830851.3
1995	152922963
1996	346525679.8
1997	98548784.2
1998	113078704.3
1999	144134226.1
2000	123370296.6
2001	169745063.6
2002	72979142.7
2003	82086913.1
2004	84283642
2005	79674608.6
2006	130078536.8
2007	124149641.5
2008	102896704.4
2009	94775083.9
2010	174995244.9
2011	341477146.4
2012	428620603.4
2013	651814599.5
2014	750584691.6
2015	1058933959.5
2016	1168189259.3
2017	1415263895.5
2018	1574535771.3
2019	2101548520.3
2020	1970070782.6
2021	2012832732.8
2022	1993220497.3