Year	Percent
1950	9.72873
1955	8.92028
1960	7.87536
1965	7.31525
1970	7.00681
1975	6.95503
1980	6.79635
1985	7.10616
1990	9.16282
1995	9.66883
2000	10.66462
2005	10.71155
2010	11.81236
2015	11.63749
2020	13.19915
2025	15.61315
2030	17.9062
2035	19.96599
2040	22.72218
2045	26.9469
2050	31.75799
2055	36.28115
2060	39.52946
2065	41.3299
2070	41.38464
2075	41.23701
2080	40.9169
2085	41.24311
2090	41.69121
2095	41.81194
2100	41.63791