Year	PPG (TDS, current US$)
1985	775009.4
1986	913778.1
1987	1125467.2
1988	1231744.2
1989	1233733.8
1990	1513851.1
1991	1624321.5
1992	1558523.4
1993	1675142.2
1994	2670154.9
1995	3143913.8
1996	3365510.3
1997	4063949
1998	3639525.3
1999	4151193.6
2000	4552097.7
2001	2649728.4
2002	3404342.7
2003	3590618.8
2004	4226221.5
2005	4890272.3
2006	4008947.3
2007	4683705.6
2008	5449485.7
2009	3838590.3
2010	5010669.1
2011	5996957.6
2012	6376801.1
2013	6582995.5
2014	6539768.1
2015	6429938.9
2016	6180709.2
2017	5573529.1
2018	9505201
2019	5471507.4
2020	5992778.6
2021	4786307
2022	10715458.9