Table 3: The Usage Rate of New Endodontic Instruments and Techniques Separately for the Year of Graduation

Year of Graduation	Never (%)	Sometimes (%)	Mostly (%)	Always (%)
1958-1967	26.7	73.3	0.0	0.0
1968-1978	16.7	66.7	13.9	2.8
1979-1987	12.7	74.5	12.7	0.0
1988-1997	8.3	82.8	8.3	0.6
1998-2011	15.5	73.4	10.2	0.8
Total	13.6	75.7	9.9	0.8