Year	Percent
1950	8.90279
1955	8.71017
1960	8.18458
1965	11.04904
1970	11.72165
1975	11.90113
1980	12.55324
1985	11.77948
1990	11.10695
1995	10.57657
2000	7.91733
2005	7.8667
2010	8.44836
2015	8.32971
2020	7.73161
2025	6.84296
2030	6.32878
2035	5.65046
2040	5.78006
2045	6.20219
2050	6.3181
2055	6.05124
2060	5.6593
2065	5.35913
2070	5.26971
2075	5.35476
2080	5.40756
2085	5.31608
2090	5.12572
2095	4.97257
2100	4.93146