Year	Percent
1950	11.30384
1955	11.36074
1960	12.4008
1965	13.13541
1970	13.14541
1975	13.59685
1980	13.29947
1985	11.4563
1990	11.3634
1995	11.22418
2000	10.57956
2005	9.9184
2010	8.93479
2015	8.43818
2020	7.74121
2025	7.13548
2030	6.66971
2035	6.23315
2040	5.89552
2045	5.62571
2050	5.41387
2055	5.25233
2060	5.11467
2065	5.00572
2070	4.919
2075	4.85966
2080	4.82281
2085	4.80471
2090	4.78856
2095	4.78208
2100	4.7755