Year	PPG (TDS, current US$)
1999	142922688.9
2000	258802712.9
2001	257127529.3
2002	106296641.9
2003	95366616.2
2004	97594786.2
2005	107996591.7
2006	127972736.2
2007	149123478
2008	170802540.5
2009	173422443.3
2010	200707687.8
2011	237052945.7
2012	233781316
2013	256355620.4
2014	308472250.7
2015	397410379.7
2016	331704424.5
2017	367070702.1
2018	417090463.1
2019	463344450.4
2020	462444257
2021	478452532.2
2022	433913250.5