Table 4. Estimates of the Total Housing Inventory for the United States: Fourth Quarter 2003 and 2004 (Estimates are in thousands and may not add to total, due to rounding) Fourth Fourth 90-Percent quarter quarter Confidence Interval<font size="-1">(+/-)</font><sup>a</sup> 2004 Type 2003 2004 of 2004 of Percent estimate estimate estimate difference of total All housing units................. 121,415 122,740 353 500 100 Occupied........................ 105,858 107,546 373 528 88 Owner occupied................ 72,650 74,413 376 531 61 Renter occupied............... 33,208 33,133 297 420 27 Vacant.......................... 15,557 15,194 213 303 12 Year-round vacant............. 11,807 11,675 189 268 10 For rent.................... 3,809 3,731 109 155 3 For sale only............... 1,331 1,375 67 94 1 Rented or sold, awaiting occupancy.......... 1,013 901 54 79 1 Held off market............. 5,654 5,668 134 189 5 For occasional use........ 1,964 1,916 79 112 2 Temporarily occupied by persons with usual residence elsewhere. 951 1,152 61 83 1 For other reasons......... 2,739 2,600 92 131 2 Seasonal vacant............... 3,750 3,519 106 153 3 a\A 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. NOTE: The Current Population Survey/Housing Vacancy Survey (CPS/HVS) estimates are now controlled to independent housing unit estimates. This should make the CPS/HVS estimate of housing units more comparable to other Census Bureau housing surveys.