Year	Percent
1950	10.61817
1955	10.06843
1960	12.13636
1965	11.47229
1970	11.39923
1975	9.68545
1980	8.53038
1985	7.98413
1990	7.80541
1995	8.05619
2000	7.64495
2005	7.37753
2010	6.48244
2015	5.77422
2020	5.7857
2025	5.70296
2030	5.3841
2035	4.93883
2040	4.72999
2045	4.66118
2050	4.65946
2055	4.63134
2060	4.55266
2065	4.47308
2070	4.43429
2075	4.46646
2080	4.53015
2085	4.58195
2090	4.60713
2095	4.60967
2100	4.60359