Year	Percent
1950	14.6636
1955	14.73213
1960	14.47065
1965	14.21112
1970	13.93511
1975	13.66531
1980	13.41784
1985	13.19997
1990	13.22185
1995	13.76584
2000	14.29683
2005	14.94077
2010	15.6875
2015	16.45929
2020	17.38611
2025	18.28568
2030	18.93308
2035	19.55652
2040	20.42762
2045	21.32597
2050	22.2723
2055	22.9726
2060	23.35847
2065	23.68002
2070	24.00229
2075	24.39814
2080	24.76873
2085	25.07193
2090	25.30017
2095	25.47984
2100	25.63259