General Anesthesia Drugs Market, by TYPE OF DRUGS (Propofol, Sevoflurane, Desflurane, Others), by ROUTE OF ADMNISTRATION (Intravenous, Inhalation), by SURGERY TYPE (Knee and hip replacements, Heart surgeries, Cancer surgery, General surgery), by END USER (Hospital, Ambulatory surgical centers): Global Opportunity Analysis and Industry Forecast, 2021-2031