Education Budget - Insurance costs?

Continuing to look through the many pages of West Haven budget information (the total document is something like 125 pages long), I remain inside the section on Education.

Here's something disconcerting - why has the cost of health insurance jumped so signficantly?

From page 98 of the budget:

	2002/2003 Actual	2003/2004 Actual	2004/2005 Actual	2005/2006 Budget	2006/2007 Requested
Health Insurance: Cert	5,250,829	6,479,017	6,992,454	6,530,930	7,706,642
Health Insurance: Non-Cert	2,264,822	2,528,081	2,799,952	2,452,985	3,251,343
Total	7,515,651	9,007,098	9,792,406	8,983,915	10,957,985
% Change	-	+20%	>+ 9%	- 8%	+22%

If we have reduced the number of workers, why the 22% increase in health insurance??