Table 2: Representation of medians and interquartile range (IQR), as well as the representation of means and standard deviations (SD). Note: performed statistical test of Kruskal-Wallis test and Dunn's Multiple Comparison Test.
| Year | Median (IQR) | Mean (SD) | p-value |
| 2013 | 38 (26) | 38.5 (15.7) | 0.2452 |
| 2014 | 37 (24) | 38.7 (15.1) | |
| 2015 | 38 (28.5) | 40.8 (16.3) | |
| 2016 | 35 (31) | 37.7 (15.8) |