never treated, 1977 to 1980, 1981 to 1987
Codes
Label
never treated, 1977 to 1980, 1981 to 1987
-
0 never treated -
80 1977 to 1980 -
87 1981 to 1987 -
88 1988 -
89 1989 -
90 1990 -
91 1991 -
92 1992 -
93 1993 -
94 1994 -
95 1995