as I was searching already several times for this information, I put it now here 

QLA available since 2012/12/12, publicly available since 2013/09/01 and official alerts since 2014/03/18

|| # total || # ||Date, Time || Source || additional info ||
|| || || || || ||
|| 1 || 1 || 10.6.2014 0:57 || Mrk 501 || 3-4 CU, for night of 8./9.6.2014 ||
|| 2 || 2 || 19.6.2014 3:32 || Mrk 501 || ~ 3 CU ||
|| 3 || 3 || 21.6.2014 2:46 || Mrk 501 || 3-4 CU, only 1 bin above limit ||
|| 4 || 4 || 24.6.2014 2:17 || Mrk 501 || > 5 CU, triggered HESS Atel #6268 ||
|| 5 || 5 || 28.7.2014 0:28 || Mrk 501 || > 5 CU, missed other alerts around this date || 
|| 6 || 6 || 22.8.2014 1:12 || Mrk 501 || ~ 3 CU ||
|| 7 || 1 || 4.12.2014 1:29 || Mrk 421 || 3-4 CU, for the night of 2./3.12.2014 ||
|| || || || || ||
|| 8 || 1 || 19.10.2015 2:13 || 1ES 1959+650 || 1-2 CU for 20-30 min ||
|| 9 || 2 || 4.11.2015 22:13 || 1ES 1959+650 || 1 CU for 10-20 min ||
|| 10 || 3 || 15.11.2015 21:46 || 1ES 1959+650 || 1 CU for 10-20 min ||
|| 11 || 2 || 17.12.2015 6:29 || Mrk 421 || 3 CU for 20 min, 2 CU for > 1.5h, not ideal weather ||
|| || || || || ||
|| 12 || 4 || 29.4.2016 11:03 || 1ES 1959+650 || confirmation of bright emission, indication for flux increasing with time ||
|| Atel 1 || 1 || 30.4.2016 00:54 || 1ES 1959+650 || Atel #9010 (with Fermi-LAT, MAGIC, VERITAS) ||
|| 13 || 5 || 30.4.2016 7:56 || 1ES 1959+650 || update, similar flux to last night ||
|| 14 || 6 || 17.5.2016 6:21 || 1ES 1959+650 || 0.5-1 CU, referred to in Atel #9070 || 
|| 15 || 7 || 6.6.2016 9:46 || 1ES 1959+650 || > 1CU, referred to in Atel #9121, highest flux so far from the source ||
|| 16 || 8 || 7.6.2016 5:35 || 1ES 1959+650 || > 1CU with 4 sigma in first bin then decrease ||
|| 17 || 9 || 8.6.20168:43 || 1ES 1959+650 || update, still > 0.5 CU with 6 sigma for the whole night ||
|| 18 || 10 || 9.6.2016 6:20 || 1ES 1959+650 || > 0.5CU with > 4 sigma so far and one 20 in bin > 3 sigma ||
|| 19 || 11 || 10.6.2016 6:44 || 1ES 1959+650 || > 1CU with three bins > 3 sigma and > 6 sigma for total night so far, flux again as high as 4 nights ago (highest flux) ||
|| Atel 2 || 1 || 10.6.2016 19:00 || Mrk 421 || Atel #9137 (with HAWC and Swift) ||
|| Atel 3 || 2 || 10.6.2016 22:04 || 1ES 1959+650 || Atel #9139 ||
|| 20 || 12 || 11.6.2016 6:44 || 1ES 1959+650 || 1-1.3 CU with three bins > 3 sigma and ~ 6 sigma for total night so far, highest flux so far ||
|| 21 || 13 || 12.6.2016 11:37 || 1ES 1959+650 || 1-1.5 CU with 4 bins > 3 sigma and 8.5 sigma for total night, highest excessrate so far ||


short summary: 

|| Source || trigger limit || # alerts || # atels || 
|| || || || || 
|| Mrk 501 || 3 CU || 6 || - ||
|| Mrk 421 || 3 CU || 2 || 1 ||
|| 1ES 1959+650 || 0.5 CU, 3 sigma || 13 || 2 ||