This is the best summary I could find:...

This is the best summary I could find:

https://www.uptodate.com/contents/c...19-critical-care-and-airway-management-issues

• China – In the Chinese cohorts, rates of ICU admission or severe illness ranged from 7 to 26 percent.
• Italy - Consistent with the range reported in China, preliminary reports from Italy suggest that the proportion of ICU admissions were between 5 and 12 percent of the total positive SARS-CoV-2 cases, and 16 percent of all hospitalized patients.
• United States of America – Among 5700 patients hospitalized with COVID-19 in New York, 1151 (20 percent) required mechanical ventilation. In an early study of 21 critically ill patients in Washington State, USA, 81 percent of patients with COVID-19 pneumonia were admitted to the ICU and 71 percent were mechanically ventilated. However, this high rate likely reflects the older age of the population which largely came from a nursing home in the region. A larger analysis of 2449 patients reported hospitalization rates of 20 to 31 percent and ICU admission rates of 4.9 to 11.5 percent.

Statistics in China perhaps different due to the larger group of smokers in the population. Both China and Italy also have an overall population with a higher average age.