Year	Percent
1950	11.17105
1955	7.24183
1960	7.41894
1965	9.29553
1970	10.39138
1975	10.08243
1980	8.77059
1985	7.92838
1990	7.8553
1995	8.10524
2000	8.79244
2005	7.95173
2010	6.02489
2015	5.42082
2020	6.3752
2025	7.08829
2030	6.56758
2035	6.00076
2040	5.63813
2045	5.61907
2050	5.82939
2055	5.99263
2060	5.8952
2065	5.62532
2070	5.40671
2075	5.35859
2080	5.42802
2085	5.4822
2090	5.42452
2095	5.26584
2100	5.118