Year	Percent
1950	10.89565
1955	11.48522
1960	11.33682
1965	11.06966
1970	11.46281
1975	12.08558
1980	12.44238
1985	12.75753
1990	12.45625
1995	13.23072
2000	14.09369
2005	15.87904
2010	17.26162
2015	18.00381
2020	17.92651
2025	17.18345
2030	15.9141
2035	15.79978
2040	16.55185
2045	17.99941
2050	20.70707
2055	22.05983
2060	22.33822
2065	22.19566
2070	21.36133
2075	21.42804
2080	22.27137
2085	23.07191
2090	23.33369
2095	22.95959
2100	22.42763