Year	PPG (TDS, current US$)
1984	16725805.6
1985	52760247.1
1986	93502616.7
1987	38269277.7
1988	51119702.8
1989	56200343.5
1990	51564340.5
1991	71201258.5
1992	72487021.5
1993	109306749.5
1994	107700032.1
1995	140789131.8
1996	100047538.6
1997	85689262.8
1998	64197986.6
1999	65954037.8
2000	53781223.9
2001	46353316.9
2002	37267943
2003	47675579.1
2004	34970992.9
2005	39782287.4
2006	36035970
2007	24523630.1
2008	33387671.7
2009	46135826.5
2010	86043807.2
2011	78952987.5
2012	89874938.9
2013	263491093.4
2014	311414574.6
2015	410992002
2016	319152141.3
2017	366190710.1
2018	462913904.9
2019	618246048.9
2020	631111106.4
2021	552982587.2
2022	668653566.6