Year	Percent
1950	15.68049
1955	15.3345
1960	14.41067
1965	14.64182
1970	14.51906
1975	15.23398
1980	16.65724
1985	17.50146
1990	19.26057
1995	20.93358
2000	24.19639
2005	27.7857
2010	31.03665
2015	32.90372
2020	31.90594
2025	30.70114
2030	28.40677
2035	27.19626
2040	26.43694
2045	24.66191
2050	23.54619
2055	21.67659
2060	20.56361
2065	20.76138
2070	21.49336
2075	22.11262
2080	22.14372
2085	21.76922
2090	21.19944
2095	20.88041
2100	21.06244