| yearmonth | created | closed |
|---|---|---|
| 2005-11-30 | 75 | 25 |
| 2005-12-30 | 12 | 15 |
| 2006-01-30 | 26 | 16 |
| 21 | 11 | |
| 2006-03-30 | 15 | 28 |
| 2006-04-30 | 100 | 52 |
| 2006-05-30 | 45 | 37 |
| 2006-06-30 | 180 | 159 |
| 2006-07-30 | 43 | 45 |
| 2006-08-30 | 73 | 72 |
| 2006-09-30 | 57 | 43 |
| 2006-10-30 | 37 | 40 |
| 2006-11-30 | 21 | 19 |
| 2006-12-30 | 31 | 31 |
| 2007-01-30 | 23 | 38 |
| 172 | 76 | |
| 2007-03-30 | 254 | 179 |
| 2007-04-30 | 58 | 48 |
| 2007-05-30 | 151 | 150 |
| 2007-06-30 | 144 | 133 |
| 2007-07-30 | 62 | 51 |
| 2007-08-30 | 54 | 48 |
| 2007-09-30 | 67 | 81 |
| 2007-10-30 | 88 | 105 |
| 2007-11-30 | 53 | 62 |
| 2007-12-30 | 81 | 39 |
| 2008-01-30 | 100 | 63 |
| 173 | 164 | |
| 2008-03-30 | 165 | 158 |
| 2008-04-30 | 152 | 115 |
| 2008-05-30 | 135 | 111 |
| 2008-06-30 | 132 | 143 |
| 2008-07-30 | 107 | 101 |
| 2008-08-30 | 77 | 80 |
| 2008-09-30 | 107 | 101 |
| 2008-10-30 | 273 | 189 |
| 2008-11-30 | 199 | 208 |
| 2008-12-30 | 86 | 79 |
| 2009-01-30 | 136 | 105 |
| 293 | 185 | |
| 2009-03-30 | 201 | 168 |
| 2009-04-30 | 132 | 117 |
| 2009-05-30 | 175 | 182 |
| 2009-06-30 | 245 | 237 |
| 2009-07-30 | 103 | 100 |
| 2009-08-30 | 223 | 172 |
| 2009-09-30 | 335 | 196 |
| 2009-10-30 | 266 | 208 |
| 2009-11-30 | 223 | 207 |
| 2009-12-30 | 147 | 135 |
| 2010-01-30 | 239 | 148 |
| 218 | 266 | |
| 2010-03-30 | 380 | 375 |
| 2010-04-30 | 189 | 194 |
| 2010-05-30 | 207 | 156 |
| 2010-06-30 | 210 | 229 |
| 2010-07-30 | 120 | 115 |
| 2010-08-30 | 200 | 186 |
| 2010-09-30 | 280 | 239 |
| 2010-10-30 | 147 | 164 |
| 2010-11-30 | 216 | 200 |
| 2010-12-30 | 145 | 122 |
| 2011-01-30 | 187 | 231 |
| 174 | 206 | |
| 2011-03-30 | 220 | 143 |
| 2011-04-30 | 180 | 130 |
| 2011-05-30 | 243 | 184 |
| 2011-06-30 | 91 | 78 |
| 2011-07-30 | 154 | 129 |
| 2011-08-30 | 155 | 149 |
| 2011-09-30 | 290 | 179 |
| 2011-10-30 | 182 | 267 |
| 2011-11-30 | 280 | 239 |
| 2011-12-30 | 159 | 133 |
| 2012-01-30 | 197 | 241 |
| 159 | 187 | |
| 2012-03-30 | 242 | 230 |
| 2012-04-30 | 228 | 204 |
| 2012-05-30 | 251 | 189 |
| 2012-06-30 | 247 | 208 |
| 2012-07-30 | 229 | 182 |
| 2012-08-30 | 231 | 177 |
| 2012-09-30 | 189 | 152 |
| 2012-10-30 | 324 | 322 |
| 2012-11-30 | 248 | 246 |
| 2012-12-30 | 121 | 122 |
| 2013-01-30 | 195 | 184 |
| 275 | 227 | |
| 2013-03-30 | 216 | 177 |
| 2013-04-30 | 207 | 160 |
| 2013-05-30 | 247 | 263 |
| 2013-06-30 | 219 | 171 |
| 2013-07-30 | 155 | 139 |
| 2013-08-30 | 145 | 102 |
| 2013-09-30 | 288 | 233 |
| 2013-10-30 | 414 | 281 |
| 2013-11-30 | 285 | 341 |
| 2013-12-30 | 198 | 206 |
| 2014-01-30 | 458 | 303 |
| 383 | 340 | |
| 2014-03-30 | 456 | 348 |
| 2014-04-30 | 337 | 232 |
| 2014-05-30 | 435 | 453 |
| 2014-06-30 | 359 | 222 |
| 2014-07-30 | 281 | 219 |
| 2014-08-30 | 319 | 299 |
| 2014-09-30 | 238 | 193 |