More often than not? Really? What percentage of 18 year olds drink? What percentage get into drunk driving accidents?
The goal should be to reduce the problems associated with drinking, right? Strict prohibition against all drinking doesn't get rid of the problem. Teaching kids about alcohol, proper behavior, etc. needs to be part of that.
Here are some interesting statistics.
http://www.cspinet.org/booze/mlpafact.htm
Fact Sheet:
Lowering the Minimum Drinking Age Is a Bad Idea
State Age-21 laws are one of the most effective public policies ever implemented in the Nation...I am chagrined to report that some supposedly responsible officials would like to repeal them.(1)
Jim Hall, Chairman
National Transportation Safety Board
In 1984, Congress passed the National Minimum Purchase Age Act, to encourage each state to enact a minimum legal purchase age (MLPA) of 21 by 1986. The result was impressive: an estimated 1,071 lives were saved in 1987 alone. From 1975 - 1996, the estimated number of lives saved reached nearly 17,000.(2) In addition to a 63% decline in alcohol-related crash fatalities among young drivers since 1982, findings show that the MLPA has decreased the number of DWI arrests, youth suicides, marijuana use, crime, and alcohol consumption by youth.(3,4)
Youth Alcohol Consumption
High school seniors who could not legally drink until age 21 drank less before age 21 and between ages 21 - 25 than did seniors in states with lower drinking ages.(5,6) Similarly, a national survey of 16 - 21 year-olds found that teens from states with a higher MLPA drank less frequently.(7)
The 1978 National Study of Adolescent Drinking Behavior found that 10th - 12th graders in states with lower drinking ages drank significantly more, were less likely to abstain from alcohol, and were drunk more often than students in states with a drinking age of 21.(8)
A study of New York college students documented that students who began drinking at younger ages were more likely to drink heavily in college. They were also more likely to report alcohol-related problems such as trouble at work, with friends, family, and police.(9)
The behavior of 18 year-olds is particularly influential on youth ages 15 - 17, as young people typically imitate the practices of those who are slightly older, rather than the practices of those who are significantly older.(10) Therefore, if 18 year-olds can legally drink, their immediate, younger peers will drink too.
Fatalities, Crashes, and DWI Arrests
State motor vehicle fatality data from the 48 continental states found that lowering the MLPA for beer from 21 to 18 during the 1970s resulted in an 11% increase in fatalities among this age group.(11)
An Arizona Department of Public Safety report found that fatal accidents increased over 25% while traffic fatalities increased more than 35% after the state MLPA was lowered from 21 to 19.(12)
A Michigan study found that police reports of had been drinking crashes increased 35%, while the incidence of nighttime single-vehicle crashes among young men increased 17% after the state reduced its MLPA from 21 to 18.(13) Another Michigan study found that DWI arrests increased 141% for 18 - 20 year-olds after the state lowered the MLPA. Roadside surveys showed that the proportion of 16 - 20 year-old drivers with blood alcohol concentrations (BAC) over .05 more than doubled.(14)
Other Alcohol-Related Problems
The younger a person begins using alcohol, the greater the chance of developing alcohol dependence or abuse some time in their life. Of those who begin drinking at age-18, 16.6% subsequently are classified with alcohol dependence and 7.8% with alcohol abuse. If a person waits until age-21 before taking their first drink, these risks decrease by over 60%.(15)
The earlier a person begins using alcohol, the greater the risk of current and adult drug use(16, 17) and harm to the developing brain.(18)
Between 1979 and 1984, the suicide rate was 9.7% greater among adolescents and young adults who could legally consume alcohol than among their peers who could not.(19)
Using national data on alcohol and drug use among high school seniors from 1976 - 1987, one study found a decrease in marijuana use associated with increases in the MLPA.(20)
In raising the MLPA from 18 to 21, states observed an average 16% decrease in the rate of vandalism arrests, compared to an average 1.7% increase in states with a constant MLPA of 18.(21)
In Australia, lowering the drinking age was associated with an increase of 20% to 25% in cases of male delinquency.(22)
An Australian study of two states that lowered their MLPA found a significant increase in hospital admissions as a result of non-traffic alcohol-related accidents.(23)
References