| 02.09.12 | Letter 37 |
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| 30.04.12 | Letter 36 |
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| 26.03.12 | Letter 35 |
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| 14.03.12 | Letter 34 |
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| 07.03.12 | Letter 33 |
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| 05.03.12 | Letter 32 |
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| 02.03.12 | Letter 31 |
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| 02.12.11 | Letter 30 |
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| 25.11.11 | Letter 29 |
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| 24.10.11 | Letter 28 |
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| 16.10.11 | Letter 27 |
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| 04.10.11 | Letter 26 |
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| 30.09.11 | Letter 25 |
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| 17.09.11 | Letter 24 |
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| 26.06.11 | Letter 23 |
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| 22.06.11 | Letter 22 |
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| 23.05.11 | Letter 21 |
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| 16.05.11 | Letter 20 |
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| 28.04.11 | Letter 19 |
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| 05.04.11 | Letter 18 |
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| 16.01.11 | Letter 17 |
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| 15.01.11 | Letter 16 |
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| 15.12.10 | Letter 15 |
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| 27.11.10 | Letter 14 |
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| 10.11.10 | Letter 13 |
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| 21.10.10 | Letter 12 |
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| 06.10.10 | Letter 11 |
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| 07.04.10 | Letter 10 |
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| 23.03.10 | Letter 9 |
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| 25.10.09 | Letter 8 |
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| 13.09.09 | Letter 7 |
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| 12.10.08 | Letter 6 |
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| 10.11.08 | Letter 5 |
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| 07.10.08 | Letter 4 |
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| 02.05.02 | Letter 3 |
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| 22.02.97 | Letter 2 |
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| 06.04.93 | Letter 1 |
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