Are younger or older Australian school students aged 12-17 years more likely to have used cocaine?

The proportions of Australian school students in different age groups who have used cocaine in the past month, past year, and in their lifetime are presented in the graph below.

1% of Australian school students aged 12 years have used cocaine in their lifetime; 1% in the past year; and 1% in the past month.

1% of Australian school students aged 13 years have used cocaine in their lifetime; 1% in the past year; and <1% in the past month.

1% of Australian school students aged 14 years have used cocaine in their lifetime; 1% in the past year; and 1% in the past month.

2% of Australian school students aged 15 years have used cocaine in their lifetime; 2% in the past year; and 1% in the past month.

3% of Australian school students aged 16 years have used cocaine in their lifetime; 2% in the past year; and 1% in the past month.

6% of Australian school students aged 17 years have used cocaine in their lifetime, 4% in the past year; and 2% in the past month.

Source: Cancer Council Victoria. (2018). ASSAD 2017 Statistics & Trends: Australian secondary school students' use of tobacco, alcohol, over-the-counter drugs, and illicit substances.

Please note: No statistical significance testing has been conducted on these data. As a result, no inferences can be made about whether the reported proportions are significantly different from one another.