An owner's equity in real estate is the difference between the value of the property and the balance on any outstanding mortgages. Ignoring transaction costs, equity represents the net funds the owner would receive from the sale of the property. According to Exh $1-3,$ what is the owner's equity in housing as a percent of the value of housing in the US$?$

$($Input your answer as a whole percentage and without the $\%$ sign, e$.$g$.,50\%$ is input as $50$ not $0\mathrm{.}50)$