Year	Percent
1950	7.83031
1955	6.44233
1960	5.38649
1965	4.95876
1970	4.70963
1975	4.56813
1980	4.46519
1985	4.82551
1990	5.43213
1995	5.95171
2000	6.26209
2005	7.02234
2010	7.26557
2015	8.29497
2020	9.7772
2025	11.85897
2030	14.56341
2035	17.43056
2040	21.01193
2045	25.95003
2050	30.66956
2055	33.36121
2060	34.35772
2065	34.93732
2070	36.14028
2075	37.75996
2080	38.81087
2085	39.00858
2090	38.67565
2095	38.38238
2100	38.46653