The graph shows past-year steroid use among 8th, 10th, and 12th graders for the years 1991 to 1999. Data for each category follows:

Percent of 12th graders who used steroids in the past year:

• 1991: approximately 1.3 percent
• 1992: approximately 1 percent
• 1993: approximately 1.25 percent
• 1994: approximately 1.25 percent
• 1995: approximately 1.5 percent
• 1996: approximately 1.4 percent
• 1997: approximately 1.4 percent
• 1998: approximately 1.6 percent
• 1999: approximately 1.75 percent

Percent of 10th graders who used steroids in the past year:

• 1991: approximately 1.1 percent
• 1992: approximately 1.1 percent
• 1993: approximately 0.8 percent
• 1994: approximately 1.1 percent
• 1995: approximately 1.2 percent
• 1996: approximately 1.2 percent
• 1997: approximately 1.2 percent
• 1998: approximately 1.2 percent
• 1999: approximately 1.65 percent

Percent of 8th graders who used steroids in the past year:

• 1991: approximately 0.9 percent
• 1992: approximately 1.1 percent
• 1993: approximately 0.8 percent
• 1994: approximately 1.2 percent
• 1995: approximately 1.0 percent
• 1996: approximately 0.8 percent
• 1997: approximately 1.0 percent
• 1998: approximately 1.2 percent
• 1999: approximately 1.6 percent