United States of America
29 phút
1986
Terry Losardo
Department of Health and Human Services,
National Institute of Drug Abuse

1995
4.3

2002
6.0

2002
6.2

1989
6.2

1997
4.9

2009
10.0

2025
7.0

1981
6.7

1988
7.1

1990
6.8

1993
7.3
2024
10.0

2000
6.8

2002
6.8

2003
6.7

2004
6.2

1973
6.5

1978
6.2

2001
5.9

2001
6.5