Monday Miscellany

* The median age of passenger cars in operation hit a record-high 9.4 years in 2008, up from 9.2 years in 2007. The median age of all trucks on the road rose to 7.6 years from 7.3 during that period. (R.L. Polk & Co.)

* Seventy-nine percent of teenagers consider themselves “knowledgeable about financial matters.” (Mintel)

* An international poll finds 64 percent of female respondents in the U.S. considering themselves “financially independent,” vs. 80 percent in France and 76 percent in Britain. (Synovate)

* Seventy-six percent of 18-29-year-olds have cut their spending on entertainment in the past year, vs. 55 percent of those 65-plus. (Zogby Interactive)

* Thirty-one percent of a poll’s respondents report saving money by exercising at home rather than going to a gym. (WSL Strategic Retail)

* Retail sales of non-games software declined nearly 10 percent last year vs. 2007, from $2.9 billion to $2.6 billion. (The NPD Group)