Line chart with two lines; the percent of high school seniors who used cocaine within the last 12 months and 30 days, 1984-2008.

For high school seniors who used cocaine within the last 12 months, the percent began at 11.6 in 1984 and increased, reaching 13.1 in 1985. After 1985, the percent fell, reaching a low of 3.1 in 1992. After 1992, it fluctuates with a high of 6.2 as it increases to 4.4 in 2008.

For high school seniors who used cocaine within the last 30 days, the percent began at 5.8 in 1984 and increased, reaching 6.7 in 1985. Then the percent fell, reaching 1.3 in 1992. It then fluctuates with a high of 2.6 as it increases to 1.9 in 2008.

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