Table 2. Number of measles cases in North Rhine–Westphalia by quarter, based on data from associations of statutory health insurance physicians (KV) and as reported according to the Law on Protection Against Infectious Diseases in 2006 and 2007 (outbreak shaded in beige).
| Quarter | Confirmed cases of measles (KV data) | Measles cases (report data) | Confirmed cases of measles (KV data) : measles cases (report data) ratio |
| 1st quarter 2006 | 618 | 608 | 1.02 : 1 |
| 2nd quarter 2006 | 1095 | 1057 | 1.04 : 1 |
| 3rd quarter 2006 | 170 | 84 | 2.02 : 1 |
| 4th quarter 2006 | 83 | 13 | 6.38 : 1 |
| 1st quarter 2007 | 166 | 53 | 3.13 : 1 |
| 2nd quarter 2007 | 224 | 188 | 1.19 : 1 |
| 3rd quarter 2007 | 90 | 9 | 10 : 1 |
| 4th quarter 2007 | 88 | 2 | 44 : 1 |
| Total | 2534 | 2014 | 1.26 : 1 |