Year	Percent
1950	12.61064
1955	12.11202
1960	13.09012
1965	13.01175
1970	13.11575
1975	13.47225
1980	14.04714
1985	14.46144
1990	15.07076
1995	14.8807
2000	14.98701
2005	15.02115
2010	15.50559
2015	16.05601
2020	15.575
2025	14.92851
2030	14.44343
2035	14.00471
2040	13.47215
2045	12.83946
2050	12.15311
2055	11.47675
2060	10.86903
2065	10.29657
2070	9.78262
2075	9.2866
2080	8.80836
2085	8.37551
2090	7.9662
2095	7.60437
2100	7.28664