Heroin 1977 4,871 15 1978 5,062 42 1979 4,585 35 1980 4,860 69 1981 4,518 121 1982 4,891 Not recorded this year 1983 5,052 490 Recorded as dependent or having recently abused drugs 1984 4,753 1,163 1985 5,273 Report is not available 1986 5,587 Report is not available 1987 5,446 Report is not available 1988 5,229 Report is not available 1989-90 4,920 2,301 1990-91 4,753 2,714 Table 2 Year Methodology Average Daily Population Number of Tests Completed Proportion Estimated to have Drug Dependency Issues 1996-97 MDT* 5,993 Information is not available 36% 1997-98 MDT 6,059 7,070 29% 1998-99 MDT 6,029 7,162 25% 1999-00 MDT 5,975 6,605 22% 2000-01 MDT 5,883 5,647 21% 2001-02 MDT 6,186 6,974 22% 2002-03 MDT 6,475 7,529 23% 2003-04 MDT 6,621 6,456 35% 2004-05 MDT 6,779 7,308 37% Note: *The phased introduction of MDT from February 1996 meant that not all establishments were carrying out tests for all of 1996-97. The following data are not comparable...