Year	Percent
1950	6.6364
1955	6.02096
1960	5.84472
1965	5.50285
1970	5.35686
1975	5.47772
1980	5.4721
1985	6.43032
1990	7.62222
1995	8.71216
2000	9.67386
2005	10.3431
2010	10.95918
2015	12.37155
2020	14.17392
2025	16.40558
2030	18.93285
2035	21.01804
2040	23.48517
2045	26.19532
2050	28.64948
2055	30.07202
2060	30.56256
2065	30.67651
2070	31.08997
2075	32.52202
2080	33.79012
2085	34.68459
2090	35.20383
2095	35.54362
2100	35.97571