Year	%
2000	26.446826437784182
2001	26.090924561448308
2002	25.791014362781326
2003	25.623996014146293
2004	25.375013971705236
2005	25.13173489175025
2006	24.95299062804609
2007	24.698308552310802
2008	24.518946711417506
2009	24.272970944351165
2010	23.947960496663377
2011	23.62891400779976
2012	23.28243400942161
2013	23.000281111724416
2014	22.70062804508454
2015	22.478487505999528
2016	22.239551755409266
2017	21.91474927154349
2018	21.61492738194928
2019	21.364729384351428