| | | | |  | 6000 | 7000 | | | 90 500 20 60 | 50 | | | |  | 1980 | | 1985 | | | |  | 4 3 30 | 20 300 200 | | |  | | | | | | 200 20 | | | | | | 6 10 | |  | | | | | | | | | | | | | ( ) |