Year	Percent
1950	15.68715
1955	15.64455
1960	15.43622
1965	15.09843
1970	14.6669
1975	14.17478
1980	13.67928
1985	13.29163
1990	13.01436
1995	12.82671
2000	12.72065
2005	12.77344
2010	13.32165
2015	14.15906
2020	15.10868
2025	15.68099
2030	15.73492
2035	15.51167
2040	15.54932
2045	16.14735
2050	17.37387
2055	18.70838
2060	19.54984
2065	20.0675
2070	20.40299
2075	20.79806
2080	21.37121
2085	21.8816
2090	22.22527
2095	22.44651
2100	22.64489