Group A (high to high) indicated that the proportion of pPCI for AMI patients was high from 2014 to 2020, group B (middle to middle) indicated that the proportion of pPCI for AMI patients was moderate from 2014 to 2020, group C (low to middle) indicated that the proportion of pPCI for AMI patients had increased from 2014 to 2020, and group D (low to low) indicated that the proportion of pPCI for AMI patients was low from 2014 to 2020.