Year	Percent
1950	11.57998
1955	10.2679
1960	7.02338
1965	6.80946
1970	11.18513
1975	11.20133
1980	14.09106
1985	12.4395
1990	10.65072
1995	10.32516
2000	11.72799
2005	12.71117
2010	11.66876
2015	10.81021
2020	9.77108
2025	9.05303
2030	8.44408
2035	8.16224
2040	7.73607
2045	7.21693
2050	6.72815
2055	6.33682
2060	6.04661
2065	5.82945
2070	5.64374
2075	5.48139
2080	5.34077
2085	5.22439
2090	5.14345
2095	5.09463
2100	5.05135