Kendall tau rank correlations for all pairs of data series
pair	tau	p-value
tau( wl_vla , wl_wa )	0.554134697357204	1.65776281590979e-11
tau( wl_vla , wl_bru )	0.178251615354688	0.0303803313750584
tau( wl_vla , wl_bel )	0.853367433930094	0
tau( wl_wa , wl_bru )	0.271215376472683	0.000986808385882831
tau( wl_wa , wl_bel )	0.697357203751066	0
tau( wl_bru , wl_bel )	0.251599169998243	0.00224313650474284