Table 1.

Frequency of isolated microorganisms standardized by year. 2001–first half of 2008.

Year	Number of isolates (n)	Number of hospitals	Total months notified	Average months notified	Average of isolates per month per hospital
2001	1176	12	127	10.6	9.3
2002	1942	13	142	10.9	13.7
2003	1841	16	188	11.8	9.8
2004	2788	19	216	11.4	12.9
2005	2959	22	262	11.9	11.3
2006	3420	22	258	11.7	13.3
2007	5070	28	326	11.6	15.6
2008	2438	33	197	6.0	12.4