Year	Percent
1950	14.43022
1955	15.13901
1960	13.59376
1965	13.98696
1970	14.46979
1975	14.89635
1980	15.10926
1985	15.35296
1990	14.46951
1995	15.29403
2000	15.38779
2005	15.41537
2010	15.12253
2015	15.23795
2020	14.05833
2025	13.6728
2030	13.17035
2035	12.59377
2040	11.94462
2045	11.32764
2050	10.75938
2055	10.21927
2060	9.72868
2065	9.26128
2070	8.82057
2075	8.40021
2080	8.00299
2085	7.6354
2090	7.29599
2095	6.97289
2100	6.6914