Year	Percent
1950	10.13426
1955	9.75752
1960	9.41354
1965	9.81829
1970	10.74463
1975	10.83291
1980	10.79348
1985	11.00552
1990	10.97845
1995	11.23139
2000	11.26836
2005	11.12168
2010	11.18003
2015	10.90573
2020	10.35803
2025	9.36897
2030	8.4092
2035	8.08645
2040	7.74894
2045	7.34475
2050	6.89058
2055	6.47209
2060	6.13315
2065	5.86383
2070	5.66508
2075	5.49866
2080	5.36475
2085	5.22743
2090	5.12561
2095	5.05034
2100	5.00294