Year	Percent
1950	16.05354
1955	16.24121
1960	16.8655
1965	16.21561
1970	15.74026
1975	15.2461
1980	13.71737
1985	13.71374
1990	14.00983
1995	13.65434
2000	12.85623
2005	12.1353
2010	10.70801
2015	10.12334
2020	9.50903
2025	9.1819
2030	8.7203
2035	8.17681
2040	7.66194
2045	7.25482
2050	6.92247
2055	6.64987
2060	6.39497
2065	6.14951
2070	5.93146
2075	5.75813
2080	5.60879
2085	5.46699
2090	5.34407
2095	5.24504
2100	5.16259