Year	base year varies by country
2002	43.8819426823011
2003	48.8558916539751
2004	57.1201427945283
2005	65.0047994599167
2006	74.3832753484487
2007	76.1474198251694
2008	86.6446806808695
2009	90.7306055600458
2010	100
2011	113.625076519513
2012	130.609627485125
2013	167.728081469198
2014	201.583029986731
2015	237.592693235235
2016	268.472730464646
2017	272.214310125883