I think you mixed up the numbers. It's capped at growing property value evaluations to 2% a year and counties may only set a property tax at 1% of assessed value. Of course that's only for the ad velorem portion of property tax. My city has fairly high fixed tax components (one of which scales by property square footage) which puts me currently 1.4%, and I expect that to increase over time as the fixed components to my property tax don't seem to have any restrictions. For homes of lesser value I'm sure the fixed costs dwarf their ad velorem components.