Year	Percent
1950	6.42434
1955	6.45546
1960	7.18907
1965	8.67237
1970	10.28797
1975	10.90709
1980	9.84537
1985	9.95583
1990	11.90299
1995	12.72317
2000	13.43377
2005	13.85521
2010	16.05418
2015	19.14691
2020	22.32688
2025	24.06452
2030	25.36225
2035	27.37116
2040	30.29407
2045	33.80437
2050	36.42949
2055	38.25351
2060	38.76087
2065	38.50996
2070	38.94595
2075	39.12522
2080	38.9145
2085	38.48352
2090	38.06592
2095	37.72663
2100	37.60693