| Value | Category |
|---|---|
| 01 | Switzerland |
| 02 | Member state of the European Union (EU) |
| 03 | Member state of the European Free Trade Association (EFTA) |
| 04 | Other European state |
| 05 | Africa |
| 06 | North America |
| 07 | Latin America and the Caribbean |
| 08 | Asia |
| 09 | Oceania |
| 99 | Unknown |