Under Proposition 13, the annual real estate tax on a parcel of property is limited to 1% of its assessed value. This "assessed value," may be increased only by a maximum of 2% per year, until and unless the property has a change of ownership. At the time of the change in ownership the low assessed value may be reassessed to complete current market value that will produce a new base year value for the property, but future assessments are likewise restricted to the 2% annual maximum increase of the new base year value.