Based on a comparison of 27 countries in 2011, Luxembourg ranked the highest in Number of foreign languages known (self-reported) by educational attainment level - All ISCED 1997 levels - 3 languages or more with 72.1% followed by Finland and Norway. On the other end of the scale was Ireland with 1.30%, Hungary with 1.70% and Bulgaria with 2.80%.
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| 2007 | 2008 | 2009 | 2010 | 2011 |
| 9.10 | ... | ... | ... | |
| 25.4 | ... | ... | ... | |
| 4.70 | ... | ... | ... | |
| 7.60 | ... | ... | ... | ... |
| 8.10 | ... | ... | ... | |
| 8.80 | ... | ... | ... | |
| 13.6 | ... | ... | ... | |
| 20.6 | ... | ... | ... | |
| 38.0 | ... | ... | ... | |
| 4.50 | ... | ... | ... | |
| 8.70 | ... | ... | ... | |
| 1.30 | ... | ... | ... | |
| ... | ... | ... | ... | |
| 6.70 | ... | ... | ... | |
| 12.0 | ... | ... | ... | |
| 20.3 | ... | ... | ... | |
| ... | ... | ... | ... | |
| 22.8 | ... | ... | ... | |
| ... | ... | ... | ... | |
| 46.1 | ... | ... | ... | |
| 4.10 | ... | ... | ... | |
| 8.90 | ... | ... | ... | |
| ... | ... | ... | ... | |
| 32.6 | ... | ... | ... | |
| 34.6 | ... | ... | ... | |
| 4.30 | ... | ... | ... | |
| 19.4 | ... | ... | ... | |
| ... | ... | ... | ... | |
| 0.300 | ... | ... | ... | ... |
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