CBNA_year_message_number

 +------+----------+----------+
 | YEAR |    COUNT |    RATIO |
 +------+----------+----------+
 |    0 |    23653 |    7.26% |
 | 2005 |    44400 |   13.64% |
 | 2006 |    62125 |   19.09% |
 | 2007 |    50756 |   15.59% |
 | 2008 |    44121 |   13.55% |
 | 2009 |    29270 |    8.99% |
 | 2010 |    20873 |    6.41% |
 | 2011 |    20904 |    6.42% |
 | 2012 |    11018 |    3.38% |
 | 2013 |     6630 |    2.03% |
 | 2014 |     5904 |    1.81% |
 | 2015 |     4628 |    1.42% |
 | 2016 |     1131 |    0.34% |
 +------+----------+----------+