Kendall tau rank correlations for all pairs of data series
pair	tau	p-value
tau( Bel , Fra )	0.433601173363454	9.45405931318533e-09
tau( Bel , Usa )	0.417906965856925	2.98612325977388e-08
tau( Bel , Jap )	0.248719095413250	0.00102036364542379
tau( Fra , Usa )	0.617292259044798	2.22044604925031e-16
tau( Fra , Jap )	0.129760263426468	0.0865476609322835
tau( Usa , Jap )	0.111973083589529	0.138453706809136