Year	Percent
1950	3.91009
1955	4.01935
1960	4.10353
1965	4.16754
1970	4.221
1975	4.26455
1980	4.30589
1985	4.34022
1990	4.7126
1995	4.76343
2000	4.8432
2005	4.78302
2010	5.00303
2015	5.05619
2020	5.1195
2025	5.22187
2030	5.43251
2035	5.8159
2040	6.38028
2045	7.03616
2050	7.74782
2055	8.50713
2060	9.27519
2065	10.28439
2070	11.3861
2075	12.58757
2080	13.78493
2085	14.99127
2090	16.22837
2095	17.49678
2100	18.77394