Question: What was the year-over-year (YoY) percentage growth in U.S. fixed asset investment in 2023 compared to 2022? (Fixed asset investment refers to expenditure on the purchase or construction of long-term tangible assets, such as buildings, machinery, and equipment, used in the production of goods and provision of services.) The percentage growth should be accurate to two decimal places, and any monetary values should be expressed in billions of U.S. dollars.
Answer: 6.51%
Rounding errors are allowed.