Year	PPG (TDS, current US$)
2009	230280943.7
2010	25658000
2011	28233771.3
2012	25860912.6
2013	27281737.7
2014	27075718.1
2015	23846549.5
2016	29294211.5
2017	30452843.7
2018	31983517.4
2019	34105761.1
2020	37956634.5
2021	44116469
2022	48489695.5