| Year | Release in nature | Escape from confinement | Corridor | Transport- contaminant | T-S/ballast water | T-S/hull fouling | T-S/other | Sea |
|---|---|---|---|---|---|---|---|---|
| 1970-1975 | 1 | 1 | 0 | 3 | 1 | 4 | 0 | Celtic Sea |
| 1976-1981 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | Celtic Sea |
| 1982-1987 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | Celtic Sea |
| 1988-1993 | 0 | 1 | 0 | 4 | 0 | 0 | 0 | Celtic Sea |
| 1994-1999 | 0 | 1 | 0 | 4 | 4 | 2 | 3 | Celtic Sea |
| 2000-2005 | 0 | 1 | 1 | 4 | 3 | 4 | 1 | Celtic Sea |
| 2006-2011 | 0 | 1 | 2 | 4 | 3 | 6 | 0 | Celtic Sea |
| 2012-2017 | 0 | 1 | 0 | 3 | 2 | 3 | 0 | Celtic Sea |
| 1970-1975 | 0 | 0 | 0 | 7 | 2 | 4 | 0 | North Sea |
| 1976-1981 | 1 | 2 | 1 | 3 | 4 | 3 | 1 | North Sea |
| 1982-1987 | 1 | 2 | 3 | 6 | 6 | 5 | 1 | North Sea |
| 1988-1993 | 1 | 3 | 0 | 9 | 8 | 3 | 2 | North Sea |
| 1994-1999 | 0 | 0 | 2 | 10 | 16 | 14 | 2 | North Sea |
| 2000-2005 | 0 | 0 | 1 | 10 | 15 | 11 | 0 | North Sea |
| 2006-2011 | 0 | 2 | 1 | 11 | 11 | 7 | 1 | North Sea |
| 2012-2017 | 0 | 1 | 1 | 4 | 5 | 3 | 0 | North Sea |
| 1970-1975 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | Baltic Sea |
| 1976-1981 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | Baltic Sea |
| 1982-1987 | 0 | 1 | 0 | 0 | 3 | 0 | 0 | Baltic Sea |
| 1988-1993 | 0 | 0 | 2 | 0 | 2 | 0 | 0 | Baltic Sea |
| 1994-1999 | 0 | 1 | 3 | 1 | 2 | 1 | 0 | Baltic Sea |
| 2000-2005 | 0 | 1 | 1 | 1 | 6 | 2 | 1 | Baltic Sea |
| 2006-2011 | 0 | 2 | 0 | 2 | 10 | 2 | 0 | Baltic Sea |
| 2012-2017 | 0 | 0 | 1 | 1 | 6 | 3 | 0 | Baltic Sea |
| 1970-1975 | 0 | 0 | 2 | 6 | 4 | 5 | 0 | Bay of Biscay |
| 1976-1981 | 2 | 4 | 1 | 8 | 2 | 2 | 0 | Bay of Biscay |
| 1982-1987 | 0 | 0 | 0 | 3 | 7 | 5 | 1 | Bay of Biscay |
| 1988-1993 | 0 | 3 | 0 | 15 | 6 | 11 | 1 | Bay of Biscay |
| 1994-1999 | 2 | 2 | 1 | 10 | 8 | 12 | 2 | Bay of Biscay |
| 2000-2005 | 0 | 0 | 2 | 15 | 9 | 11 | 1 | Bay of Biscay |
| 2006-2011 | 0 | 1 | 4 | 16 | 21 | 15 | 2 | Bay of Biscay |
| 2012-2017 | 0 | 1 | 1 | 6 | 9 | 6 | 1 | Bay of Biscay |
| 1970-1975 | 0 | 1 | 1 | 3 | 4 | 3 | 1 | Adriatic Sea |
| 1976-1981 | 0 | 0 | 0 | 4 | 4 | 6 | 2 | Adriatic Sea |
| 1982-1987 | 0 | 3 | 1 | 4 | 1 | 3 | 1 | Adriatic Sea |
| 1988-1993 | 0 | 2 | 2 | 9 | 8 | 8 | 1 | Adriatic Sea |
| 1994-1999 | 0 | 1 | 1 | 10 | 6 | 10 | 1 | Adriatic Sea |
| 2000-2005 | 0 | 4 | 0 | 10 | 16 | 11 | 3 | Adriatic Sea |
| 2006-2011 | 0 | 4 | 1 | 11 | 19 | 14 | 2 | Adriatic Sea |
| 2012-2017 | 0 | 1 | 1 | 2 | 9 | 10 | 0 | Adriatic Sea |
| 1970-1975 | 0 | 1 | 0 | 1 | 3 | 2 | 0 | Black Sea |
| 1976-1981 | 0 | 1 | 0 | 1 | 2 | 1 | 0 | Black Sea |
| 1982-1987 | 0 | 0 | 0 | 3 | 5 | 11 | 0 | Black Sea |
| 1988-1993 | 0 | 0 | 0 | 2 | 6 | 4 | 0 | Black Sea |
| 1994-1999 | 0 | 0 | 0 | 3 | 7 | 3 | 0 | Black Sea |
| 2000-2005 | 1 | 1 | 0 | 4 | 22 | 8 | 0 | Black Sea |
| 2006-2011 | 0 | 0 | 0 | 2 | 14 | 8 | 0 | Black Sea |
| 2012-2017 | 0 | 1 | 0 | 1 | 2 | 3 | 0 | Black Sea |
| 1970-1975 | 0 | 3 | 0 | 5 | 9 | 7 | 1 | Western Mediterranean Sea |
| 1976-1981 | 1 | 2 | 4 | 15 | 17 | 20 | 2 | Western Mediterranean Sea |
| 1982-1987 | 0 | 2 | 0 | 17 | 13 | 20 | 2 | Western Mediterranean Sea |
| 1988-1993 | 0 | 2 | 0 | 7 | 15 | 19 | 1 | Western Mediterranean Sea |
| 1994-1999 | 0 | 0 | 0 | 13 | 10 | 7 | 1 | Western Mediterranean Sea |
| 2000-2005 | 0 | 2 | 2 | 11 | 18 | 15 | 2 | Western Mediterranean Sea |
| 2006-2011 | 0 | 4 | 2 | 6 | 12 | 9 | 5 | Western Mediterranean Sea |
| 2012-2017 | 0 | 5 | 1 | 5 | 11 | 13 | 1 | Western Mediterranean Sea |
| 1970-1975 | 0 | 1 | 1 | 11 | 5 | 14 | 1 | Central Mediterranean Sea |
| 1976-1981 | 0 | 1 | 1 | 3 | 10 | 8 | 1 | Central Mediterranean Sea |
| 1982-1987 | 0 | 1 | 1 | 3 | 7 | 6 | 2 | Central Mediterranean Sea |
| 1988-1993 | 0 | 2 | 1 | 4 | 6 | 11 | 1 | Central Mediterranean Sea |
| 1994-1999 | 0 | 4 | 3 | 3 | 8 | 8 | 1 | Central Mediterranean Sea |
| 2000-2005 | 0 | 2 | 0 | 6 | 9 | 16 | 1 | Central Mediterranean Sea |
| 2006-2011 | 0 | 4 | 7 | 5 | 18 | 16 | 3 | Central Mediterranean Sea |
| 2012-2017 | 0 | 12 | 4 | 6 | 18 | 16 | 2 | Central Mediterranean Sea |
| 1970-1975 | 0 | 1 | 29 | 2 | 3 | 6 | 0 | Eastern Mediterranean Sea |
| 1976-1981 | 0 | 1 | 22 | 1 | 7 | 9 | 0 | Eastern Mediterranean Sea |
| 1982-1987 | 0 | 0 | 22 | 7 | 10 | 13 | 0 | Eastern Mediterranean Sea |
| 1988-1993 | 0 | 1 | 44 | 6 | 20 | 21 | 1 | Eastern Mediterranean Sea |
| 1994-1999 | 0 | 1 | 62 | 6 | 19 | 34 | 2 | Eastern Mediterranean Sea |
| 2000-2005 | 0 | 6 | 57 | 0 | 41 | 38 | 6 | Eastern Mediterranean Sea |
| 2006-2011 | 0 | 14 | 53 | 1 | 28 | 15 | 1 | Eastern Mediterranean Sea |
| 2012-2017 | 0 | 5 | 39 | 7 | 16 | 23 | 3 | Eastern Mediterranean Sea |