Year	Percent
1950	15.94272
1955	15.76091
1960	15.82341
1965	16.02181
1970	14.68167
1975	12.70056
1980	12.27009
1985	12.92672
1990	12.961
1995	11.75667
2000	11.71325
2005	9.76078
2010	9.29692
2015	9.72142
2020	9.25948
2025	8.53884
2030	7.97433
2035	7.62148
2040	7.36723
2045	7.08476
2050	6.78596
2055	6.4911
2060	6.21315
2065	5.973
2070	5.77617
2075	5.62681
2080	5.49259
2085	5.35095
2090	5.22515
2095	5.11194
2100	5.0272