Table 7. Homeownership Rates by Age of Householder: Second Quarter: 2006 and 2007 (in percent) 90-percent Second Second confidence 90-percent confidence Age of householder Quarter Quarter interval (±)a interval (±)a 2006 2007 of 2007 rate of difference United States..... 68.7 68.2 0.5 0.4 Under 25 years 24.5 23.6 1.5 1.4 25 to 29 years 41.4 41.7 1.4 1.4 30 to 34 years 55.6 54.6 1.4 1.4 35 to 39 years 66.3 65.1 1.3 1.2 40 to 44 years 71.3 69.9 1.2 1.1 45 to 49 years 75.0 74.4 1.1 1.2 50 to 54 years 77.8 76.7 1.1 1.2 55 to 59 years 81.1 80.1 0.8 0.8 60 to 64 years 80.9 81.3 0.9 0.9 65 to 69 years 82.2 82.1 1.4 1.2 70 to 74 years 81.9 82.1 1.5 1.4 75 years and over 79.2 78.9 1.1 1.0 Under 35 years 42.4 41.9 0.9 0.8 35 to 44 years 68.9 67.6 0.9 0.8 45 to 54 years 76.3 75.5 0.8 0.8 55 to 64 years 81.0 80.6 0.6 0.6 65 years and over 80.6 80.5 0.8 0.7 aA 90-percent confidence interval is a measure of an estimate's reliablilty. The larger the confidence interval is, in relation to the size of the estimate, the less reliable the estimate.