Year | Laboratories enrolled (n) | Participating laboratories (n) | Response rate (%) |
2006 | 76 | 70 | 92 |
2007 | 128 | 122 | 95 |
2008 | 76 | 73 | 96 |
2009 | 194 | 182 | 94 |
2010 | 146 | 129 | 88 |
2011 | 185 | 159 | 86 |
2012 | 211 | 187 | 89 |
2013 | 213 | 206 | 98 |
2014 | 227 | 205 | 90 |
2015 | 193 | 172 | 89 |
2016 | 208 | 160 | 77 |