Year	Percent
1950	11.85233
1955	12.12034
1960	12.11587
1965	11.66228
1970	11.78215
1975	11.95213
1980	12.0888
1985	12.11762
1990	12.16831
1995	12.26173
2000	12.3498
2005	12.37813
2010	12.30641
2015	12.54946
2020	12.87106
2025	12.95785
2030	12.64779
2035	12.2811
2040	11.9607
2045	11.61991
2050	11.21739
2055	10.72803
2060	10.22074
2065	9.73457
2070	9.27113
2075	8.86122
2080	8.43919
2085	8.03837
2090	7.66738
2095	7.31085
2100	6.99572