Year	Percent
1950	13.32771
1955	12.58808
1960	16.15062
1965	15.45883
1970	15.00383
1975	16.11555
1980	16.12439
1985	14.65934
1990	15.2277
1995	14.43341
2000	13.15251
2005	13.07111
2010	12.251
2015	11.06547
2020	10.41717
2025	10.46908
2030	10.38491
2035	10.00419
2040	9.21811
2045	8.29106
2050	7.64628
2055	7.39544
2060	7.32652
2065	7.16461
2070	6.80184
2075	6.33517
2080	5.97336
2085	5.83163
2090	5.83971
2095	5.83551
2100	5.70646