Year	Percent
1950	5.71678
1955	5.9702
1960	6.62487
1965	6.87818
1970	7.99307
1975	8.21752
1980	9.78795
1985	10.59408
1990	13.91502
1995	15.14401
2000	16.63717
2005	18.06474
2010	19.76115
2015	21.74093
2020	23.95917
2025	26.34436
2030	28.75785
2035	31.0286
2040	33.40234
2045	35.73849
2050	37.99759
2055	40.5389
2060	42.63686
2065	44.17332
2070	45.32035
2075	45.70618
2080	45.8679
2085	45.87548
2090	45.80462
2095	45.62601
2100	45.36846