Kendall tau rank correlations for all pairs of data series
pair	tau	p-value
tau( indgr , indpro )	0.563580829916287	2.19269269408073e-10
tau( indgr , procon )	0.440794333108906	6.93993417621996e-07
tau( indgr , afzetb )	0.578800511046362	7.33559879506629e-11
tau( indpro , procon )	0.530797637051714	2.44004438876289e-09
tau( indpro , afzetb )	0.260721480606109	0.00340407475159266
tau( procon , afzetb )	0.243181857435091	0.00631548689292005