Year	Percent
1950	7.53169
1955	6.58269
1960	5.59949
1965	4.93664
1970	4.51797
1975	4.2656
1980	4.20868
1985	4.37862
1990	4.97888
1995	5.36692
2000	5.72194
2005	5.91411
2010	5.9691
2015	6.45448
2020	7.06784
2025	8.45417
2030	10.97636
2035	14.21345
2040	17.65547
2045	20.4987
2050	22.75125
2055	24.15057
2060	25.10348
2065	26.0732
2070	27.41188
2075	29.11693
2080	30.45626
2085	31.41211
2090	32.02179
2095	32.45548
2100	32.92423