Figure 6.2 is titled "Perceived Great Risk of Use of Selected Illicit Drugs among Youths Aged 12 to 17: 2002 and 2003." It is a bar graph, with the following note below the graph: "Statistically significant differences (at 0.05 level) between 2002 and 2003 are denoted by '+.'" The horizontal axis of the graph represents selected illicit drug use, and the vertical axis represents the percentage perceiving great risk. There are four categories of selected illicit drug use: Smoke Marijuana Once a Month, Use Cocaine Once a Month, Try Heroin Once or Twice, and Try LSD Once or Twice. Within each of these four categories there is a bar for 2002 and a bar for 2003.
The percentage of youths who perceived that smoking marijuana once a month was a great risk was 32.4% in 2002 and 34.9% in 2003. This is a significant difference at the 0.05 level.
The percentage of youths who perceived that using cocaine once a month was a great risk was 50.5% in 2002 and 51.4% in 2003.
The percentage of youths who perceived that trying heroin once or twice was a great risk was 58.5% in 2002 and 58.8% in 2003.
The percentage of youths who perceived that trying LSD once or twice was a great risk was 52.6% in 2002 and 53.4% in 2003.