| Event | Year | Start | End | Races | Teams |
|---|---|---|---|---|---|
| North American Championship | 1993 | 30 Aug | 03 Sep | 5 | 31 |
| European Championship | 1992 | 10 Jun | 18 Jun | 5 | 44 |
| European Championship | 1988 | 02 Oct | 10 Oct | 5 | 70 |
| European Championship | 1985 | 01 Jan | 01 Jan | 5 | 86 |
| European Championship | 1983 | 30 Jul | 06 Aug | 5 | 74 |
| European Championship | 1981 | 01 Jan | 01 Jan | 6 | 82 |
| European Championship | 1979 | 03 Aug | 11 Aug | 6 | 69 |
| North American Championship | 1978 | 01 Jan | 01 Jan | ||
| European Championship | 1976 | 17 Jul | 23 Jul | 6 | 82 |
| European Championship | 1975 | 10 Aug | 16 Aug | 6 | 57 |
| European Championship | 1973 | 18 Aug | 26 Aug | 6 | 78 |
| European Championship | 1971 | 05 Jun | 11 Jun | 5 | 83 |
| European Championship | 1969 | 15 Aug | 23 Aug | ||
| North American Championship | 1968 | 01 Jan | 01 Jan |