Фактические данные
| Дата | Значение | Изменение, % |
|---|---|---|
| 2015 | 23,53 | -5,53% |
| 2010 | 24,91 | -2,57% |
| 2005 | 25,57 | 13,60% |
| 2000 | 22,51 | -1,28% |
| 1995 | 22,80 | 13,61% |
| 1990 | 20,07 | 8,32% |
| 1985 | 18,53 | -7,55% |
| 1980 | 20,04 | 10,93% |
| 1975 | 18,07 | 11,92% |
| 1970 | 16,14 | 15,97% |
| 1965 | 13,92 | 14,76% |
| 1960 | 12,13 |