Year	$ 2017 PPP (%)
2007	0.62
2008	0.5
2009	0.52
2010	0.43
2011	0.39
2012	0.21
2013	0.33
2014	0.48
2015	0.46
2016	0.42
2017	0.41
2018	0.55
2019	0.72
2020	0.43
2021	0.34