Years Site W df pvalue
19 vs 18 HMC 3.030 2 0.220
18 vs 17 HMC 22.99 2 0.000
17 vs 16 HMC 6.77 2 0.034
16 vs 15 UMBS 5.533 2 0.063
18 vs 17 SNWR 35.319 2 0.000
17 vs 16 SNWR 26.202 2 0.000
20 vs 18 DMP 7.948 2 0.018
18 vs 17 DMP 9.884 2 0.007