Year	%
2000	16.212104320517085
2001	15.843800873030926
2002	15.681476007117418
2003	15.56357543741806
2004	15.29873168255017
2005	14.877346457497888
2006	14.68612892312111
2007	14.414706028785712
2008	14.380550630862421
2009	14.163665682949178
2010	14.04073632198621
2011	13.835845266642218
2012	13.631720546745274
2013	13.384887363575794
2014	13.26690363396427
2015	13.251945599566142
2016	13.283528695655821
2017	13.004355598448358
2018	12.82182672083911
2019	12.716035891136336