Year	Percent
1950	11.75999
1955	11.21754
1960	8.30943
1965	10.04194
1970	10.67466
1975	10.236
1980	10.28125
1985	8.98698
1990	8.17708
1995	7.20389
2000	7.18513
2005	7.24013
2010	6.48882
2015	6.28412
2020	4.80977
2025	4.75015
2030	4.53068
2035	4.61303
2040	4.7895
2045	4.75824
2050	4.53447
2055	4.3548
2060	4.34357
2065	4.46757
2070	4.63306
2075	4.72151
2080	4.68688
2085	4.61211
2090	4.59639
2095	4.66176
2100	4.75521