| 2010 | 2009 | |||
| DKK million | DKK million | |||
| Trade receivables | 1,860 | 1,536 | ||
| Allowances for doubtful trade receivables | (133) | (125) | ||
| 1,727 | 1,411 | |||
| Amounts owed by related companies | 45 | 57 | ||
| Trade receivables at December 31 | 1,772 | 1,468 |
| 2010 | 2009 | |||
| DKK million | DKK million | |||
| Changes in allowances for doubtful trade receivables: | ||||
| At January 1 | 125 | 126 | ||
| Allowances during the year | 64 | 59 | ||
| Write-offs during the year | (18) | (14) | ||
| Reversed allowances | (38) | (46) | ||
| Allowances at December 31 | 133 | 125 | ||
| The cost is included in Sales and distribution costs. | ||||
| Allocation of overdue net receivables (not written off) by maturity period is as follows: | ||||
| Up to 30 days | 155 | 148 | ||
| Between 30 days and 90 days | 32 | 34 | ||
| Between 91 days and 365 days | 3 | 2 | ||
| December 31 | 190 | 184 | ||