Year	Percent
1950	14.01454
1955	14.43053
1960	14.74461
1965	14.44059
1970	13.71827
1975	13.86858
1980	14.34598
1985	15.26906
1990	15.68343
1995	16.92457
2000	18.88113
2005	21.44606
2010	24.71025
2015	25.51622
2020	26.0989
2025	26.18909
2030	25.72174
2035	25.84197
2040	26.04866
2045	26.14482
2050	25.76286
2055	25.56901
2060	25.23845
2065	24.90011
2070	24.74239
2075	24.21349
2080	23.76289
2085	23.47301
2090	23.22193
2095	22.99373
2100	22.76342