Year	Percent
1950	9.85371
1955	9.64339
1960	9.75041
1965	10.26339
1970	10.3621
1975	10.12598
1980	10.2754
1985	10.54604
1990	10.70137
1995	10.45203
2000	10.76265
2005	11.77487
2010	12.02477
2015	10.54552
2020	9.65307
2025	9.49502
2030	9.05236
2035	8.59241
2040	8.0312
2045	7.49505
2050	7.02827
2055	6.6285
2060	6.27653
2065	5.96494
2070	5.69852
2075	5.48216
2080	5.32517
2085	5.20871
2090	5.11174
2095	5.03279
2100	4.97262