Year	Percent
1950	7.98513
1955	10.00521
1960	13.72767
1965	15.75186
1970	14.9507
1975	11.31643
1980	10.27228
1985	10.07184
1990	10.66386
1995	11.38074
2000	9.74711
2005	7.27622
2010	6.98882
2015	7.75482
2020	7.88962
2025	7.06989
2030	6.19639
2035	5.54328
2040	5.28485
2045	5.38136
2050	5.48109
2055	5.32429
2060	5.01707
2065	4.75332
2070	4.67973
2075	4.7847
2080	4.92801
2085	4.97269
2090	4.89413
2095	4.78587
2100	4.75141