Convergency test							Pair-wise t-tests for equality of means
Test Variables	2006		2007		2008		2006 vs 2007	2006 vs 2008	2007 vs 2008
Test Variables	Mean	Standard Deviation	Mean	Standard Deviation	Mean	Standard Deviation	2006 vs 2007	2006 vs 2008	2007 vs 2008
DIFF(NI)	0.1199	0.1143	0.0701	0.0711	0.0820	0.1336	*
DIFF(ΝΑ)	0.1799	0.2255	0.3495	0.4318	0.1565	0.1949	*		**
DIFF(ROΝΑ)	0.1178	0.2131	0.4477	0.9542	0.1318	0.2480	*		*
DIFF(EPS)	0.4680	0.5143	0.2395	0.2471	0.2227	0.2351	*	**