Year	Percent
1950	11.61549
1955	11.16806
1960	10.63644
1965	13.69934
1970	13.09152
1975	13.59946
1980	14.01148
1985	13.91897
1990	13.15122
1995	14.02954
2000	13.76083
2005	13.36928
2010	13.15098
2015	12.05849
2020	10.67036
2025	9.94724
2030	9.92465
2035	9.89867
2040	9.63767
2045	8.94241
2050	8.0723
2055	7.46926
2060	7.287
2065	7.32194
2070	7.27236
2075	6.99656
2080	6.5693
2085	6.21964
2090	6.08728
2095	6.12065
2100	6.14244