On September 18, the business society's isopropanol index was 54.39, unchanged from yesterday, down 59.21% from the highest point of 133.33 points during the period (June 10, 2020), and up 23.22% from the lowest point of 44.14 points on May 27, 2019. (Note: the period refers to November 1, 2012 to present)
