This figure comprises a line graph showing antibiotic use in the UK and the USA between 2000 and 2015. The horizontal axis is labelled year and is marked from 2000 to 2015 in 1-year intervals. The vertical axis is labelled standard units per 1000 population and is marked from 0 to 30000 in intervals of 5000. Antibiotic use in the UK is shown in orange. Antibiotic use in the USA is shown in blue. Both lines remain relatively constant between 2000 and 2015.