【正确答案】The line graph shows the number of dangerous driving convictions per 100 thousand people in Australia for 2006-2007 in terms of the type of offence and in terms of age. Looking at the graph, it is clear that the most common transgressions were alcohol related and that people in the 20-24 age bracket were the most frequent culprits.
Conviction rates for all four of the specified dangerous driving offences peaked among 20-24 year olds, after which there was a negative correlation-more distinct for some transgressions than for others-between age and the offence rate. In more detail, at all ages the number of people adjudicated to have exceeded the legal alcohol limit was by far the highest, rising from 400 to about 900 per 100 thousand people as age increased from 15-19 to 20-24, but then falling steadily back to 400 by the age of 44 and further dropping to 200 for those aged over 45. Negligent driving convictions were the second most common offences committed by 15-19 year olds, at roughly 350 per 100 thousand, and this climbed slightly to 400 among 20-24 year otds. However, the rate fell sharply in the next 5 year age bracket to about 200, which made it the least common offence among people in their mid-twenties or older, and from there it declined gradually to below 100 for the 45+ group. With the increase in age from 15-19 to 20-24, there was a corresponding increase in driving under the influence adjudications from 200 per 100 thousand citizens to just over 350, but as people got older the rate steadily decreased. Speeding convictions were least frequent with the youngest age group, at less than 100, but this rose to almost 300 among 20-24 year olds and remained almost constant at this level across the 25-29, 30-34, 35-39 and 40-44 age categories until it fell slightly in the oldest age group. Thus it can be said that speeding was the offence least affected by age.