Year	Percent
1950	10.27094
1955	9.72995
1960	11.68607
1965	11.10616
1970	10.93607
1975	9.39924
1980	8.36818
1985	7.86358
1990	7.68627
1995	7.87342
2000	7.47006
2005	7.26555
2010	6.32245
2015	5.58577
2020	5.61174
2025	5.54958
2030	5.23318
2035	4.79924
2040	4.5987
2045	4.53813
2050	4.54449
2055	4.5254
2060	4.45652
2065	4.3861
2070	4.35445
2075	4.39023
2080	4.45513
2085	4.50564
2090	4.52889
2095	4.52928
2100	4.52257