Year	Percent
1950	10.48012
1955	10.31478
1960	10.3718
1965	10.52198
1970	11.54598
1975	12.15149
1980	11.72846
1985	11.84518
1990	10.68973
1995	9.41226
2000	8.79303
2005	8.01311
2010	8.55802
2015	7.65316
2020	7.66535
2025	6.49754
2030	5.55116
2035	5.36681
2040	5.45069
2045	5.58609
2050	5.53418
2055	5.30727
2060	5.04984
2065	4.92764
2070	4.98541
2075	5.10556
2080	5.16118
2085	5.12402
2090	5.04027
2095	4.9968
2100	5.02577