Year	Percent
1950	9.90764
1955	9.85312
1960	9.16881
1965	10.36135
1970	11.93643
1975	11.17531
1980	10.00346
1985	9.85734
1990	12.40602
1995	13.56348
2000	14.91127
2005	16.3775
2010	17.11538
2015	18.99916
2020	20.92307
2025	22.96585
2030	24.19639
2035	25.2211
2040	25.67749
2045	26.19542
2050	27.36619
2055	29.06452
2060	29.49812
2065	28.96534
2070	28.74203
2075	29.18414
2080	29.73693
2085	30.4529
2090	30.96618
2095	31.13236
2100	31.22047