Kendall tau rank correlations for all pairs of data series
pair	tau	p-value
tau( Producten , Machines )	0.286467514469347	0.000557498016599878
tau( Producten , Electronica )	0.245937637241985	0.00303285718125079
tau( Producten , Medisch )	0.36575192978011	1.03626183771688e-05
tau( Machines , Electronica )	0.174868206685276	0.0351269557738620
tau( Machines , Medisch )	0.279815567001615	0.000746140161976827
tau( Electronica , Medisch )	0.147091112216491	0.0761766314043342