Year	PPG (TDS, current US$)
1981	1174761.7
1982	1227892
1983	1335616.6
1984	1245310.5
1985	1463626.3
1986	1899678.6
1987	2342115.4
1988	3136456.7
1989	4947399.1
1990	6021579.6
1991	9769620.1
1992	11327882.4
1993	10986936.3
1994	10345381.6
1995	10943244
1996	11881155.6
1997	12120818.1
1998	13961517.1
1999	15719405.1
2000	27334175.1
2001	21802578.6
2002	17065798.9
2003	26493251
2004	20084424.4
2005	27320910.6
2006	30863091.7
2007	42027024.3
2008	48342610.7
2009	42011970.2
2010	41255295.8
2011	43251035.7
2012	43571159.6
2013	35123374.1
2014	34520062.2
2015	66099121.8
2016	44287819.1
2017	42415404.9
2018	44030933.7
2019	45899546.1
2020	42350370.1
2021	43643789.3
2022	48742894.1