Races per nation
Number of races and racedays per country in 1990.
Top nations for team
67% of all racedays for PDM - Ultima - Concorde were in Spain, France or Belgium.
Per country
| Pos. | Nation | Number of races | Racedays |
|---|---|---|---|
| 1 | Belgium | 16 | 18 |
| 2 | France | 12 | 40 |
| 3 | Spain | 11 | 44 |
| 4 | Italy | 7 | 12 |
| 5 | Netherlands | 3 | 8 |
| 6 | Switzerland | 2 | 9 |
| 7 | Canada | 1 | 1 |
| 8 | Germany | 1 | 1 |
| 9 | Great Britain | 1 | 1 |
| 10 | Ireland | 1 | 5 |
| 11 | Mexico | 1 | 5 |
| 12 | Sweden | 1 | 3 |
| 13 | United States | 1 | 6 |