Table 2: Temporal trends in immunization exemptions to measles-containing vaccine among 7-year-old students in Ontario during the 2002/03 to 2012/13 school years, by exemption classification | School year | Proportion of students, % |
|---|
| Medical exemptions | Prior immunity | Religious/conscientious exemptions | Total exemptions |
|---|
| 2002/03 | 0.51 | 0.07 | 1.05 | 1.63 |
| 2003/04 | 0.48 | 0.06 | 1.10 | 1.65 |
| 2004/05 | 0.38 | 0.09 | 1.15 | 1.62 |
| 2005/06 | 0.31 | 0.07 | 1.14 | 1.52 |
| 2006/07 | 0.29 | 0.07 | 1.32 | 1.68 |
| 2007/08 | 0.20 | 0.06 | 1.34 | 1.61 |
| 2008/09 | 0.21 | 0.08 | 1.41 | 1.70 |
| 2009/10 | 0.19 | 0.05 | 1.65 | 1.90 |
| 2010/11 | 0.17 | 0.05 | 1.42 | 1.64 |
| 2011/12 | 0.17 | 0.06 | 1.41 | 1.63 |
| 2012/13 | 0.16 | 0.06 | 1.54 | 1.75 |
| p < 0.001 | p < 0.05 | p < 0.001 | p < 0.001 |