10: ranking of San Francisco in a CommercialCafe study on urban parks and walkability in the United States . . . 2: San Francisco’s rank for its share of walking commuters out of total commuters in the same study . . . 65: age of Covid-19 victim and Trump voter Mark Anthony Urquiza, whose story was told at the recent Democratic National Convention by his daughter, San Francisco resident Kristin Urquiza . . . 2–1: ratio of the number of condos to single-family homes on the San Francisco residential property market, as of mid-August . . . 2,200–40,000 square feet: size of new office leasing spaces just made available on the Presidio’s Main Post, some for the first time ever . . . 25.5: percentage of people aged 18–24 who reported suicidal thoughts during the pandemic, according to a new study from the Centers for Disease Control and Prevention . . . $240.6 million: amount San Francisco contracts with providers of homeless services in fiscal year 2019–20 . . . 19th century: original installation era of some of the water mains being replaced as part of the massive Van Ness Improvement Project.