Year | Cluster time frame | Observed | Expected | RR | LLR | P value |
---|---|---|---|---|---|---|
2011 | June 2011‒November 2011 | 263,791 | 217,413.54 | 1.54 | 10,001.22 | 0.001 |
2012 | June 2012‒October 2012 | 191,492 | 156,514.83 | 1.46 | 6616.78 | 0.001 |
2013 | June 2013‒September 2013 | 103,288 | 74,790.01 | 1.71 | 7765.72 | 0.001 |
2014 | June 2014‒September 2014 | 69,368 | 50,870.66 | 1.67 | 4818.10 | 0.001 |
2015 | June 2015‒September 2015 | 47,765 | 34,955.17 | 1.67 | 3361.85 | 0.001 |
2016 | June 2016‒July 2016 | 13,924 | 9154.33 | 1.70 | 1327.50 | 0.001 |
2011‒2016 | January 2011‒October 2013 | 1,001,309 | 634,364.34 | 3.27 | 207,689.62 | 0.001 |