Year	$ 2017 PPP (%)
2007	2.51
2008	2.18
2009	2.66
2010	1.74
2011	1.08
2012	0.79
2013	0.96
2014	1.66
2015	1.82
2016	1.51
2017	1.5
2018	2.03
2019	2.94
2020	2.41
2021	1.92