Year	Percent
1950	4.80811
1955	4.9743
1960	5.18191
1965	5.34139
1970	5.36187
1975	5.10823
1980	5.05546
1985	5.5788
1990	7.03517
1995	7.81377
2000	8.45185
2005	8.85254
2010	9.11032
2015	10.34616
2020	12.23258
2025	14.30507
2030	16.40522
2035	18.57798
2040	20.88212
2045	23.48589
2050	25.72004
2055	27.69604
2060	29.00876
2065	30.18677
2070	31.41778
2075	33.09287
2080	34.52803
2085	35.70699
2090	36.66981
2095	37.50371
2100	38.29974