Arrow chart showing the share of available rental office space in select U.S. cities from Q1 2020 to Q1 2023. San Francisco had the most, going from 9.6% to 22.9%. five other cities are shown, with all of them below 15% in 2020 and above 15.8$% in 2023. The U.S. total went from 12.4% to 16.4%.