Texas law written into the constitution of the state when it was founded in 1845 banned home equity loans. This was a result of a bank panic and foreclosures of that period when many homesteaders lost their land. The change banned lenders from selling mortgages to homesteaders. Till 1998 Texans could not take out home equity loans. New laws restricted the total debt on a home to 80% of its appraised value. This loan to appraised value limit plus the restriction that home equity loans could not be used to pay other debt kept homeowners in Texas from facing a high rate of foreclosures. Fed studies show that in 2005 U.S. homeowners took out $500 billon from their home's appraised value through home equity loans and cash out refinancing. Of this $263 billion went into consumer spending and paying off debts. This Fed study co-authored by Greenspan shows that 80% of the three fold increase in American mortgage debt between 1990 and 2006 came from home equity taken out on rising home values.