What do you pay for car insurance for 6 months (for a car registered in Florida)?

Even though I have no tickets or accidents, over the past 2-3 years, my carrier has increased my 6-month premium from around $400 to $700. Is this happening all over Florida (or is it just me)?

Lastly, I'm reluctant to switch insurance companies b/c I'm bundled with my home owner's policy and that rate happens to still be very reasonable.

Thanks!