Year	Percent
1950	3.61243
1955	3.7128
1960	3.79243
1965	3.8552
1970	3.90847
1975	3.95364
1980	3.99507
1985	4.0296
1990	4.34565
1995	4.38398
2000	4.4421
2005	4.57387
2010	4.70414
2015	4.64673
2020	4.69773
2025	4.81213
2030	5.05486
2035	5.45755
2040	5.98942
2045	6.57329
2050	7.19335
2055	7.87435
2060	8.61723
2065	9.55326
2070	10.62446
2075	11.79512
2080	12.95283
2085	14.11896
2090	15.31688
2095	16.54775
2100	17.79183