Year	Percent
1950	13.36934
1955	12.62877
1960	16.21622
1965	15.51948
1970	15.05824
1975	16.34141
1980	16.44592
1985	14.91302
1990	15.41615
1995	14.84614
2000	13.35074
2005	13.19881
2010	12.41564
2015	11.1965
2020	10.50756
2025	10.49051
2030	10.35118
2035	9.96761
2040	9.18201
2045	8.25821
2050	7.6246
2055	7.39081
2060	7.35015
2065	7.21905
2070	6.89066
2075	6.44902
2080	6.10354
2085	5.97593
2090	5.99804
2095	6.00586
2100	5.88567