Year	Percent
1950	14.33278
1955	14.24743
1960	14.14751
1965	14.04652
1970	14.01621
1975	13.90073
1980	13.52249
1985	12.84555
1990	12.07469
1995	11.7311
2000	11.50181
2005	11.54333
2010	11.82995
2015	12.30077
2020	13.13134
2025	14.26014
2030	15.2886
2035	16.07398
2040	16.63194
2045	17.13716
2050	17.99795
2055	19.12932
2060	20.13146
2065	20.89145
2070	21.32974
2075	21.59431
2080	21.97303
2085	22.42486
2090	22.86101
2095	23.19121
2100	23.40555