| Code | Year/Month | Avg. Delay |
|---|---|---|
| BOS | 2003/6 | 54.3 min |
| BOS | 2003/7 | 63.6 min |
| BOS | 2003/8 | 59.4 min |
| BOS | 2003/9 | 58.8 min |
| BOS | 2003/10 | 52.3 min |
| BOS | 2003/11 | 56 min |
| BOS | 2003/12 | 58.7 min |
| BOS | 2004/1 | 59 min |
| BOS | 2004/2 | 49.9 min |
| BOS | 2004/3 | 53.5 min |
| BOS | 2004/4 | 58.7 min |
| BOS | 2004/5 | 62.9 min |
| BOS | 2004/6 | 55.1 min |
| BOS | 2004/7 | 60.8 min |
| BOS | 2004/8 | 64.6 min |
| BOS | 2004/9 | 51.7 min |
| BOS | 2004/10 | 48.7 min |
| BOS | 2004/11 | 54.2 min |
| BOS | 2004/12 | 58.3 min |
| BOS | 2005/1 | 60 min |
| BOS | 2005/2 | 52.6 min |
| BOS | 2005/3 | 49.6 min |
| BOS | 2005/4 | 57.9 min |
| BOS | 2005/5 | 53.2 min |
| BOS | 2005/6 | 52.6 min |
| BOS | 2005/7 | 59.3 min |
| BOS | 2005/8 | 61.5 min |
| BOS | 2005/9 | 60.5 min |
| BOS | 2005/10 | 52.8 min |
| BOS | 2005/11 | 49.4 min |
| BOS | 2005/12 | 53.1 min |
| BOS | 2006/1 | 56.4 min |
| BOS | 2006/2 | 59.6 min |
| BOS | 2006/3 | 49.6 min |
| BOS | 2006/4 | 49.4 min |
| BOS | 2006/5 | 60.3 min |
| BOS | 2006/6 | 65.4 min |
| BOS | 2006/7 | 63.1 min |
| BOS | 2006/8 | 57.8 min |
| BOS | 2006/9 | 63.7 min |
| BOS | 2006/10 | 59.8 min |
| BOS | 2006/11 | 57.2 min |
| BOS | 2006/12 | 60.6 min |
| BOS | 2007/1 | 56.2 min |
| BOS | 2007/2 | 61.9 min |
| BOS | 2007/3 | 53.1 min |
| BOS | 2007/4 | 57.7 min |
| BOS | 2007/5 | 56.9 min |
| BOS | 2007/6 | 59.9 min |
| BOS | 2007/7 | 65.4 min |
| BOS | 2007/8 | 56.7 min |
| BOS | 2007/9 | 55.6 min |
| BOS | 2007/10 | 56.5 min |
| BOS | 2007/11 | 61.7 min |
| BOS | 2007/12 | 57.3 min |
| BOS | 2008/1 | 60.5 min |
| BOS | 2008/2 | 55.9 min |
| BOS | 2008/3 | 62.3 min |
| BOS | 2008/4 | 58.7 min |
| BOS | 2008/5 | 59.7 min |
| BOS | 2008/6 | 68.7 min |
| BOS | 2008/7 | 70 min |
| BOS | 2008/8 | 68.4 min |
| BOS | 2008/9 | 56.8 min |
| BOS | 2008/10 | 59.6 min |
| BOS | 2008/11 | 65.1 min |
| BOS | 2008/12 | 68.6 min |
| BOS | 2009/1 | 54.6 min |
| BOS | 2009/2 | 54.2 min |
| BOS | 2009/3 | 58.7 min |
| BOS | 2009/4 | 55.8 min |
| BOS | 2009/5 | 61.8 min |
| BOS | 2009/6 | 70.2 min |
| BOS | 2009/7 | 71.7 min |
| BOS | 2009/8 | 58.2 min |
| BOS | 2009/9 | 53.4 min |
| BOS | 2009/10 | 53.4 min |
| BOS | 2009/11 | 53.2 min |
| BOS | 2009/12 | 55.7 min |
| BOS | 2010/1 | 59.1 min |
| BOS | 2010/2 | 55.7 min |
| BOS | 2010/3 | 59.2 min |
| BOS | 2010/4 | 51.9 min |
| BOS | 2010/5 | 52.8 min |
| BOS | 2010/6 | 57.5 min |
| BOS | 2010/7 | 62.2 min |
| BOS | 2010/8 | 57 min |
| BOS | 2010/9 | 61.2 min |
| BOS | 2010/10 | 55 min |
| BOS | 2010/11 | 52.5 min |
| BOS | 2010/12 | 63.4 min |
| BOS | 2011/1 | 56.1 min |
| BOS | 2011/2 | 62.4 min |
| BOS | 2011/3 | 62.8 min |
| BOS | 2011/4 | 64.9 min |
| BOS | 2011/5 | 63.2 min |
| BOS | 2011/6 | 59.8 min |
| BOS | 2011/7 | 64.5 min |
| BOS | 2011/8 | 65.5 min |
| BOS | 2011/9 | 57.8 min |
| BOS | 2011/10 | 58.3 min |
| BOS | 2011/11 | 53.9 min |
| BOS | 2011/12 | 56.6 min |
| BOS | 2012/1 | 52.1 min |
| BOS | 2012/2 | 57.6 min |
| BOS | 2012/3 | 51 min |
| BOS | 2012/4 | 57.9 min |
| BOS | 2012/5 | 58.2 min |
| BOS | 2012/6 | 55.7 min |
| BOS | 2012/7 | 62 min |
| BOS | 2012/8 | 60 min |
| BOS | 2012/9 | 58.9 min |
| BOS | 2012/10 | 59.8 min |
| BOS | 2012/11 | 56.9 min |
| BOS | 2012/12 | 61.1 min |
| BOS | 2013/1 | 56.6 min |
| BOS | 2013/2 | 53.8 min |
| BOS | 2013/3 | 56.8 min |
| BOS | 2013/4 | 57.3 min |
| BOS | 2013/5 | 55.4 min |
| BOS | 2013/6 | 63.3 min |
| BOS | 2013/7 | 60.8 min |
| BOS | 2013/8 | 55.7 min |
| BOS | 2013/9 | 55.2 min |
| BOS | 2013/10 | 49.2 min |
| BOS | 2013/11 | 50.7 min |
| BOS | 2013/12 | 58.1 min |
| BOS | 2014/1 | 66.7 min |
| BOS | 2014/2 | 55.7 min |
| BOS | 2014/3 | 51.7 min |
| BOS | 2014/4 | 51.1 min |
| BOS | 2014/5 | 54.9 min |
| BOS | 2014/6 | 59.4 min |
| BOS | 2014/7 | 61.5 min |
| BOS | 2014/8 | 54.1 min |
| BOS | 2014/9 | 57.4 min |
| BOS | 2014/10 | 54.9 min |
| BOS | 2014/11 | 53.6 min |
| BOS | 2014/12 | 51.8 min |
| BOS | 2015/1 | 53.5 min |
| BOS | 2015/2 | 64.8 min |
| BOS | 2015/3 | 54.2 min |
| BOS | 2015/4 | 52.6 min |
| BOS | 2015/5 | 56.4 min |
| BOS | 2015/6 | 59.9 min |
| BOS | 2015/7 | 60.9 min |
| BOS | 2015/8 | 60.3 min |
| BOS | 2015/9 | 60.7 min |
| BOS | 2015/10 | 57.4 min |
| BOS | 2015/11 | 52.8 min |
| BOS | 2015/12 | 63.8 min |
| BOS | 2016/1 | 56.9 min |