Nearly 19% or 797,000 children in Florida do not have health insurance, and experts expect the number to rise as more parents are laid off, according to a report released by Families USA. The number may also rise as employers increase insurance costs, the report said. The study was conducted between 2005 and 2007 and does not reflect this year's financial woes. Families USA estimates the actual number of uninsured children in the country right now is far greater than the 8.6 million reported in 2007.