Year	Percent
1950	14.47142
1955	14.26445
1960	14.53323
1965	14.39251
1970	14.48803
1975	15.13296
1980	15.3304
1985	15.38938
1990	15.93964
1995	17.22334
2000	19.77136
2005	23.30077
2010	26.88371
2015	27.61874
2020	26.71772
2025	24.17387
2030	21.61148
2035	20.76807
2040	21.43408
2045	23.35278
2050	24.97345
2055	25.91775
2060	25.70586
2065	24.90462
2070	24.41797
2075	23.97108
2080	23.75932
2085	23.51264
2090	23.1489
2095	22.74234
2100	22.42043