Year	Percent
1950	14.44866
1955	14.41755
1960	14.14118
1965	13.66179
1970	13.27491
1975	13.33265
1980	13.89853
1985	13.99331
1990	14.90827
1995	16.65305
2000	18.34833
2005	19.38106
2010	20.25921
2015	20.69637
2020	21.55956
2025	23.40507
2030	25.96697
2035	28.25907
2040	29.51314
2045	28.92166
2050	27.1888
2055	25.60225
2060	24.93442
2065	25.09064
2070	25.45362
2075	25.37936
2080	24.80191
2085	24.03234
2090	23.50329
2095	23.37258
2100	23.46204