Year	%
2000	3.09545936462751
2001	3.02220928564656
2002	2.93292457152653
2003	2.7926867334915
2004	2.58849040138825
2005	2.34978070602123
2006	2.31513145068936
2007	2.13345277121109
2008	2.02338324009762
2009	2.03361543058192
2010	1.91643405635399
2011	1.91048006342528
2012	1.98774363846195
2013	1.79468653458898
2014	1.86361402977153
2015	1.66987136564455
2016	1.63958754166226
2017	1.7012712084044
2018	1.72153629726696
2019	1.25431787149694
2020	1.223960890286