Фактические данные
| Дата | Значение | Изменение, % |
|---|---|---|
| 2015 | 21,94 | -3,66% |
| 2010 | 22,77 | -0,72% |
| 2005 | 22,94 | 14,80% |
| 2000 | 19,98 | -1,67% |
| 1995 | 20,32 | 13,19% |
| 1990 | 17,95 | 7,53% |
| 1985 | 16,69 | -5,83% |
| 1980 | 17,73 | 12,12% |
| 1975 | 15,81 | 13,24% |
| 1970 | 13,96 | 13,26% |
| 1965 | 12,33 | 13,42% |
| 1960 | 10,87 |