Year	Percent
1950	8.19083
1955	7.59076
1960	7.00831
1965	6.97141
1970	6.97923
1975	7.00196
1980	7.07412
1985	7.41665
1990	8.05371
1995	8.18985
2000	8.59207
2005	7.43105
2010	8.37523
2015	11.20272
2020	13.526
2025	16.0607
2030	18.30682
2035	20.46766
2040	22.23253
2045	23.86137
2050	24.84395
2055	25.24707
2060	24.79853
2065	24.35231
2070	25.07255
2075	27.10549
2080	28.80663
2085	29.8757
2090	30.64465
2095	31.46264
2100	32.39391