Year	Percent
1950	9.41387
1955	8.36743
1960	7.45485
1965	7.24984
1970	7.33933
1975	7.66528
1980	7.26095
1985	7.24207
1990	9.62099
1995	10.00808
2000	11.17918
2005	10.10869
2010	9.85951
2015	10.70156
2020	11.83306
2025	13.67919
2030	14.59056
2035	15.55538
2040	16.33983
2045	17.31695
2050	19.2444
2055	20.31175
2060	19.93897
2065	19.58661
2070	20.89149
2075	23.36609
2080	25.13214
2085	26.3006
2090	27.1143
2095	27.91184
2100	28.8722