Year	Percent
1950	15.44919
1955	18.06784
1960	18.36969
1965	18.4528
1970	18.59716
1975	18.78955
1980	18.76241
1985	18.29171
1990	18.03807
1995	18.09754
2000	18.02585
2005	17.07253
2010	16.12209
2015	15.2661
2020	14.83126
2025	14.3153
2030	13.65184
2035	12.91531
2040	12.24452
2045	11.67225
2050	11.15227
2055	10.64898
2060	10.13542
2065	9.64747
2070	9.19777
2075	8.76657
2080	8.37559
2085	7.99844
2090	7.63587
2095	7.30565
2100	6.9807