Year	Percent
1950	12.28776
1955	12.17458
1960	12.23951
1965	12.16862
1970	12.79386
1975	13.79074
1980	12.80943
1985	11.42918
1990	11.29153
1995	11.09434
2000	11.03855
2005	10.20705
2010	9.45577
2015	8.97974
2020	8.59715
2025	8.19571
2030	7.74139
2035	7.28958
2040	6.89555
2045	6.54231
2050	6.241
2055	5.98349
2060	5.74474
2065	5.54236
2070	5.367
2075	5.22434
2080	5.1086
2085	5.01248
2090	4.93151
2095	4.86463
2100	4.80476