Year	Percent
1950	16.16971
1955	15.44885
1960	14.69521
1965	13.76002
1970	12.9659
1975	11.5451
1980	11.85391
1985	10.89795
1990	10.50695
1995	11.69823
2000	11.82015
2005	12.94916
2010	16.46632
2015	18.04625
2020	19.07379
2025	20.21595
2030	21.68279
2035	23.37185
2040	25.22149
2045	26.41486
2050	26.59988
2055	26.42792
2060	26.26624
2065	26.26325
2070	26.56299
2075	26.62011
2080	26.3323
2085	25.90429
2090	25.54312
2095	25.29203
2100	25.08551