| YEAR | ISSUE | Month | Available |
| 1967 | 39 | September | 1 |
| 1968 | 43 | January | 1 |
| 1968 | 46 | April | 1 |
| 1968 | 48 | June | 1 |
| 1968 | 49 | July | 1 |
| 1968 | 50 | August | 1 |
| 1969 | 57 | March | 1 |
| 1969 | 58 | April | 1 |
| 1969 | 60 | June | 1 |
| 1969 | 63 | September | 1 |
| 1969 | 65 | November | 1 |
| 1969 | 66 | December | 1 |
| 1970 | 67 | January | 1 |
| 1970 | 68 | February | 2 |
| 1970 | 69 | March | 1 |
| 1970 | 71 | May | 1 |
| 1970 | 72 | June | 1 |
| 1970 | 73 | July | 1 |
| 1970 | 74 | August | 1 |
| 1970 | 76 | October | 1 |
| 1970 | 77 | November | 1 |
| 1970 | 78 | December | 1 |
| 1971 | 79 | January | 1 |
| 1971 | 80 | February | 1 |
| 1971 | 83 | May | 1 |
| 1971 | 85 | July | 1 |
| 1971 | 86 | August | 1 |
| 1971 | 87 | September | 1 |
| 1973 | 107 | May | 1 |
| 1975 | 127 | January | 1 |
| 1975 | 128 | February | 1 |
| 1975 | 130 | April | 1 |
| 1975 | 132 | June | 1 |
| 1975 | 133 | July | 1 |
| 1975 | 135 | September | 1 |
| 1975 | 136 | October | 1 |
| 1975 | 137 | November | 1 |
| 1975 | 138 | December | 1 |
| 1976 | 139 | January | 1 |
| 1976 | 140 | February | 1 |
| 1976 | 141 | March | 1 |
| 1976 | 143 | May | 2 |
| 1976 | 146 | August | 1 |
| 1976 | 148 | October | 1 |
| 1976 | 149 | November | 1 |
| 1977 | 151 | January | 1 |
| 1977 | 152 | February | 1 |
| 1977 | 153 | March | 1 |
| 1977 | 154 | April | 2 |
| 1977 | 155 | May | 1 |
| 1977 | 156 | June | 1 |
| 1977 | 157 | July | 1 |
| 1977 | 158 | August | 1 |
| 1977 | 159 | September | 3 |
| 1977 | 160 | October | 2 |
| 1977 | 161 | November | 1 |
| 1977 | 162 | December | 2 |
| 1978 | 163 | January | 1 |
| 1978 | 164 | February | 1 |
| 1978 | 165 | March | 2 |
| 1978 | 166 | April | 2 |
| 1978 | 167 | May | 1 |
| 1978 | 168 | June | 1 |
| 1978 | 169 | July | 2 |
| 1978 | 170 | August | 3 |
| 1978 | 171 | September | 2 |
| 1978 | 172 | October | 2 |
| 1978 | 173 | November | 2 |
| 1978 | 174 | December | 2 |
| 1979 | 175 | January | 2 |
| 1979 | 176 | February | 2 |
| 1979 | 177 | March | 2 |
| 1979 | 178 | April | 1 |
| 1979 | 179 | May | 2 |
| 1979 | 180 | June | 1 |
| 1979 | 181 | July | 2 |
| 1979 | 182 | August | 1 |
| 1979 | 183 | September | 1 |
| 1979 | 184 | October | 1 |
| 1979 | 185 | November | 1 |
| 1979 | 186 | December | 1 |
| 1980 | 187 | January | 1 |
| 1980 | 188 | February | 2 |
| 1980 | 189 | March | 1 |
| 1980 | 190 | April | 2 |
| 1980 | 191/192 | May/June | 3 |
| 1981 | 195/196 | March/April | 1 |
| 1981 | 199 | July | 2 |
| 1981 | 200 | August | 1 |
| 1981 | 201 | September | 2 |
| 1981 | 202 | October | 2 |
| 1981 | 203 | November | 1 |
| 1981 | 204 | December | 1 |
| 1982 | 206 | February | 3 |
| 1982 | 207 | March | 1 |
| 1982 | 208 | April | 1 |
| 1982 | 211/212 | July/August | 2 |
| 1982 | 213 | September | 1 |
| 1982 | 214 | October | 1 |
| 1983 | 217 | January | 1 |
| 1983 | 218 | February | 1 |
| 1983 | 220 | April | 1 |
| 1983 | 222 | June | 1 |
| 1983 | 225 | September | 1 |
| 1983 | 226 | October | 2 |
| 1983 | 227 | November | 2 |
| 1983 | 228 | December | 2 |
| 1984 | 229 | January | 2 |
| 1984 | 230 | February | 1 |
| 1984 | 231 | March | 2 |
| 1984 | 232 | April | 1 |
| 1984 | 233 | May | 1 |
| 1984 | 234 | June | 2 |
| 1984 | 235/236 | July/August | 2 |
| 1984 | 237 | September | 2 |
| 1984 | 238 | October | 2 |
| 1984 | 239 | November | 2 |
| 1984 | 240 | December | 2 |
| 1985 | 241 | January | 1 |
| 1985 | 242 | February | 1 |
| 1985 | 243 | March | 2 |
| 1985 | 245 | May | 2 |
| 1985 | 246 | June | 1 |
| 1985 | 247/248 | July/August | 1 |
| 1985 | 250 | October | 1 |
| 1985 | 252 | December | 1 |
| 1986 | 254 | February | 1 |
| 1986 | 256 | April | 1 |
| 1986 | 257 | May | 2 |
| 1986 | 259 | July | 1 |
| 1986 | 260 | August | 1 |
| 1986 | 261 | September | 1 |
| 1986 | 264 | December | 1 |
| 1987 | 265 | January | 1 |
| 1987 | 266 | February | 1 |
| 1987 | 267 | March | 1 |
| 1987 | 268 | April | 1 |
| 1987 | 274 | October | 1 |
| 1987 | 275 | November | 1 |
| 1987 | 276 | December | 1 |
| 1988 | 277 | January | 2 |
| 1988 | 278 | February | 2 |
| 1988 | 279 | March | 2 |
| 1988 | 280 | April | 2 |
| 1988 | 281 | May | 2 |
| 1988 | 282 | June | 1 |
| 1988 | 283 | July | 1 |
| 1988 | 284/285 | August/Sep | 1 |
| 1988 | 287 | November | 1 |
| 1988 | 288 | December | 2 |
| 1989 | 289 | January | 1 |
| 1989 | 290 | February | 1 |
| 1989 | 291 | March | 1 |
| 1989 | 292 | April | 1 |
| 1989 | 293 | May | 1 |
| 1989 | 294 | June | 1 |
| 1990 | 301 | January | 1 |
| 1991 | 313 | December/Jan | 1 |
| 1992 | 314 | February/March | 1 |
| 1992 | 315 | April/May | 1 |
| 1992 | 316 | June/July | 1 |
| 1992 | 317 | August/Sep | 1 |
| 1992 | 318 | October/Nov | 1 |
| 1993 | 319 | December/Jan | 1 |
| 1993 | 320 | February/March | 1 |
| 1993 | 321 | April/May | 1 |
| 1993 | 322 | June/July | 1 |
| 1993 | 323 | August/Sep | 1 |
| 1993 | 324 | October/Nov | 1 |
| 1994 | 325 | December/Jan | 1 |
| 1994 | 326 | February/March | 1 |
| 1994 | 327 | April/May | 1 |
| 1994 | 328 | June/July | 1 |
| 1994 | 329 | August/Sep | 1 |
| 1994 | 330 | October/Nov | 1 |
| 1995 | 331 | December/Jan | 1 |
| 1995 | 332 | February/March | 1 |
| 1995 | 333 | April/May | 1 |
| 1995 | 334 | June/July | 1 |
| 1995 | 335 | August/Sep | 1 |