Year	Percent
1950	1.66296
1955	2.14308
1960	2.77377
1965	3.08332
1970	3.35232
1975	3.54372
1980	3.69831
1985	3.82349
1990	4.10951
1995	4.24511
2000	4.33142
2005	4.41867
2010	4.38504
2015	4.26041
2020	4.18585
2025	4.16484
2030	4.16128
2035	4.16221
2040	4.22071
2045	4.33361
2050	4.47065
2055	4.72934
2060	5.16657
2065	5.76634
2070	6.50272
2075	7.35462
2080	8.32293
2085	9.41644
2090	10.62988
2095	11.94896
2100	13.35399