Final answer:
The success rate of smokers quitting for a year varies, but it is not specified in the given information.
Step-by-step explanation:
The percentage of smokers who are successful at quitting for a year varies depending on the country. In the United Kingdom, only about 5% of smokers who try to quit are not smoking a year later. In Australia, 73% of smokers have tried to quit. However, the success rate for quitting is not specified in the provided information.