Table 4. Estimates of the Total Housing Inventory for the United States: Third Quarter 2005 and 2006 (Estimates are in thousands and may not add to total, due to rounding) Third Third 90-Percent quarter quarter Confidence Interval(+) 2006 Type 2005 2006 of 2006 of Percent estimate estimate estimate difference of total All housing units................. 124,119 126,225 (X) (X) 100 Occupied........................ 108,431 109,629 317 288 87 Owner occupied................ 74,588 75,646 628 430 60 Renter occupied............... 33,843 33,984 537 415 27 Vacant.......................... 15,688 16,595 359 316 13 Year-round vacant............. 11,854 12,606 353 301 10 For rent.................... 3,773 3,808 173 193 3 For sale only............... 1,481 1,935 105 125 2 Rented or sold, awaiting occupancy.......... 1,191 1,159 74 106 1 Held off market............. 5,409 5,704 245 210 5 For occasional use........ 1,799 1,850 142 122 1 Temporarily occupied by persons with usual residence elsewhere. 1,020 1,121 111 94 1 For other reasons......... 2,590 2,733 172 147 2 Seasonal vacant............... 3,834 3,989 229 199 3 aA 90-percent confidence interval is a measure of an estimate's reliability. The larger the confidence interval is, in relation to the size of the estimate, the less reliable the estimate. (X) Not Applicable. Since the number of housing units is set equal to an independent national measure, there is no sampling error, and hence no confidence interval. NOTE: Since first quarter 2003, the Current Population Survey/Housing Vacancy Survey (CPS/HVS) estimates have been controlled to independent housing unit counts. Doing so should make the CPS/HVS estimate of housing units more comparable to other Census Bureau housing surveys.