Year	Percent
1950	9.02521
1955	8.97447
1960	10.01594
1965	11.48524
1970	12.67183
1975	13.38057
1980	11.8429
1985	12.54044
1990	14.63885
1995	15.01324
2000	15.25604
2005	16.11259
2010	17.82092
2015	20.69429
2020	23.286
2025	25.34388
2030	26.78061
2035	28.94423
2040	31.84915
2045	34.27264
2050	36.20396
2055	37.35477
2060	37.16303
2065	36.46677
2070	36.21122
2075	36.13403
2080	36.21414
2085	36.37347
2090	36.44484
2095	36.41041
2100	36.47004