Year	Percent
1950	5.52863
1955	6.13261
1960	6.87655
1965	7.32529
1970	8.24079
1975	8.17796
1980	9.68215
1985	10.11779
1990	12.62007
1995	13.30965
2000	14.4028
2005	15.31423
2010	16.37501
2015	17.46013
2020	19.03721
2025	20.81919
2030	22.70458
2035	24.6138
2040	26.86368
2045	29.07732
2050	31.4054
2055	33.91223
2060	36.39663
2065	38.39429
2070	39.85916
2075	40.40489
2080	40.66675
2085	40.73373
2090	40.73905
2095	40.67706
2100	40.55721