Year	Percent
1950	6.66917
1955	6.52229
1960	5.91525
1965	5.07481
1970	4.69692
1975	4.44041
1980	4.41719
1985	4.69364
1990	5.02488
1995	4.8617
2000	5.01553
2005	5.40692
2010	5.69954
2015	5.8133
2020	6.43187
2025	7.62828
2030	9.16858
2035	10.92033
2040	12.5912
2045	14.41693
2050	16.05275
2055	17.58157
2060	19.12282
2065	20.68641
2070	22.45261
2075	24.3757
2080	26.0941
2085	27.67177
2090	29.12559
2095	30.51376
2100	31.85949