Year	%
1990	5.56389472630842
1991	6.14530676974923
1992	6.78963110667996
1993	7.48402798904776
1994	8.21818181818182
1995	8.97435897435897
1996	9.66722830665543
1997	10.1809045226131
1998	10.587899543379
1999	10.9066427289049
2000	11.1703478040112
2001	11.3782051282051
2002	11.5643175466425
2003	11.7298916143754
2004	11.8832569425721
2005	12.0196290867376
2006	12.1275955461932
2007	12.1815469359651
2008	12.2178391409161
2009	12.2320633090509
2010	12.2272932443954
2011	12.1968787515006
2012	12.169384678635
2013	12.1031398000351
2014	12.0261437908497
2015	11.966537342386
2016	11.8879205908789
2017	11.9249530956848
2018	12.013763129301
2019	12.1307905735258
2020	12.3212019346208
2021	12.4546225614928
2022	12.4978922874583