Overall susceptibility rates (% of isolates)

	Jul–Dec 1997	Jan–Jun 1999	Jul–Dec 2000	Jan–Jun 2002	Jul–Dec 2003	Jan–Jun 2005	Jan–Jun 2006
Ampicillin	55.7	54.7	57.3	57.2	57.4	49.7	51.1
Co-amoxiclav	84.7	89.0	93.9	90.6	89.8	83.4	93.3
Cefalexin	94.4	93.9	92.5	95.2	96.5	95.9	94.8
Norfloxacin	98.5	98.2	96.8	96.4	93.6	90.4	87.3
Trimethoprim	78.8	79.3	80.0	82.2	78.4	76.0	74.7