Year	Percent
1950	11.28417
1955	11.72032
1960	11.81151
1965	11.86153
1970	11.9581
1975	12.18348
1980	12.41014
1985	12.72385
1990	13.05873
1995	13.38248
2000	12.96093
2005	12.16937
2010	11.89981
2015	12.3037
2020	12.42364
2025	11.99378
2030	11.44717
2035	11.03761
2040	10.78214
2045	10.53686
2050	10.25292
2055	9.93149
2060	9.59757
2065	9.31221
2070	9.04293
2075	8.80945
2080	8.56448
2085	8.31426
2090	8.08077
2095	7.8607
2100	7.63048