Smoking prevalence has dropped markedly over time - since 1996 among 15 year old boys and slightly later (since 2002 - 2004) among 15 year old girls and 13 year olds. There has been a further small decrease in smoking prevalence among 15 year old girls between 2013 and 2015.
Among 15 year olds, the mean number of cigarettes has remained similar in 2013 and 2015. However, there has been a decrease in the median number of cigarettes smoked in a week.
Use of e-cigarettes has increased markedly among all groups between 2013 and 2015.