Year	Percent
1950	5.41119
1955	5.23823
1960	5.12783
1965	5.19632
1970	6.04443
1975	6.08566
1980	6.22481
1985	6.53998
1990	7.44311
1995	7.80218
2000	8.70662
2005	10.07077
2010	12.80088
2015	13.17994
2020	14.23856
2025	16.05157
2030	17.84451
2035	19.75079
2040	20.65147
2045	21.14641
2050	22.33019
2055	24.13418
2060	25.62658
2065	26.88212
2070	27.97018
2075	29.14737
2080	30.21925
2085	31.1388
2090	31.95129
2095	32.68403
2100	33.33697