Year	Percent
1950	10.47652
1955	10.12734
1960	12.24192
1965	13.12419
1970	13.06281
1975	14.06966
1980	12.68804
1985	10.56178
1990	10.17964
1995	8.25985
2000	7.96923
2005	8.25886
2010	8.14478
2015	7.18311
2020	6.33258
2025	5.85538
2030	5.2235
2035	5.29464
2040	5.62807
2045	5.70528
2050	5.46976
2055	5.15456
2060	4.93538
2065	4.90904
2070	5.03167
2075	5.10371
2080	5.01516
2085	4.81726
2090	4.65388
2095	4.61006
2100	4.66389