Year	Percent
1950	11.91498
1955	12.32566
1960	12.06122
1965	10.6764
1970	11.30312
1975	11.77609
1980	12.09157
1985	12.10072
1990	11.9713
1995	11.69066
2000	12.19873
2005	12.44568
2010	12.53332
2015	12.19568
2020	12.00774
2025	11.74519
2030	11.55694
2035	11.28941
2040	10.91772
2045	10.49787
2050	10.09496
2055	9.73278
2060	9.39314
2065	9.05094
2070	8.70189
2075	8.36111
2080	8.04444
2085	7.75378
2090	7.47623
2095	7.2004
2100	6.94309