Year	%
2000	28.188590890232806
2001	27.662625039388754
2002	27.38667374907244
2003	27.070218010148093
2004	26.77184869642182
2005	26.42637454140286
2006	26.13178374714265
2007	25.820354720880246
2008	25.710419856487416
2009	25.517561906583914
2010	25.23226441864302
2011	25.01839631243082
2012	24.716772534544088
2013	24.44524669091199
2014	24.189882177852194
2015	24.00551875273725
2016	23.801656869016536
2017	23.569865097177075
2018	23.47623589080483
2019	23.378705353700248