Year	Percent
1950	8.10522
1955	10.58205
1960	11.14965
1965	9.08985
1970	8.4661
1975	8.33026
1980	8.53467
1985	8.65126
1990	8.24052
1995	7.82983
2000	7.1558
2005	6.44711
2010	6.12715
2015	5.72509
2020	5.59829
2025	5.57092
2030	5.50279
2035	5.38715
2040	5.27023
2045	5.17795
2050	5.11003
2055	5.08882
2060	5.0788
2065	5.04293
2070	4.99348
2075	4.94066
2080	4.91093
2085	4.90209
2090	4.89801
2095	4.8787
2100	4.84644