Year	Percent
1950	11.48224
1955	11.47836
1960	11.19616
1965	10.71828
1970	11.68193
1975	12.6061
1980	12.88753
1985	12.38651
1990	12.59568
1995	12.50711
2000	11.95417
2005	11.25087
2010	10.91344
2015	10.33498
2020	9.33183
2025	8.60504
2030	8.06693
2035	7.51446
2040	6.98102
2045	6.48161
2050	6.07073
2055	5.77485
2060	5.53571
2065	5.33302
2070	5.16552
2075	5.02889
2080	4.93164
2085	4.86063
2090	4.8155
2095	4.79024
2100	4.77278