Year	Percent
1950	9.19576
1955	9.26754
1960	13.16199
1965	13.21912
1970	14.31688
1975	13.3399
1980	12.44898
1985	11.38984
1990	11.95265
1995	10.237
2000	9.36388
2005	7.61384
2010	7.29746
2015	7.1057
2020	7.76195
2025	7.01984
2030	6.11985
2035	5.66742
2040	5.60536
2045	5.71016
2050	5.74159
2055	5.57672
2060	5.31469
2065	5.12799
2070	5.10287
2075	5.1536
2080	5.16712
2085	5.07536
2090	4.92135
2095	4.78939
2100	4.73385