While this is true it should be noted according to the website you posted 84,961 are still unaccounted for per year!
No, this is the total
accumulated number left after the additions and subtractions of all the previous years. If you look a bit, you'll find it generally keeps decreasing year by year.
Quick googling says the total number is:
Active Entries as of 1/1/2008 - 105,229
Active Entries as of 1/1/2009 - 102,764
Active Entries as of 12/31/2009 - 96,192
Active Entries as of 12/31/2010 - 85,820
Active Entries as of 01/01/2012 - 85,158
Active Entries as of 01/01/2013 - 87,217
Active Entries as of 01/01/2014 - 84,136
Active Entries as of 01/01/2015 - 84,924