Tekstuele beschrijving figuur 74 2019
| - | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| C4 groepen | 64% | 71% | 79% | 75% | 88% | 85% | 88,47% | 86,80% | 90,69% |
| C4 websites | 50,35% | 48,40% | 52,98% | 46,36% | 55,30% | 58,22% | 59,07% | 53,26% | 55,11% |
| HHI groepen | 0,1099 | 0,143 | 0,1992 | 0,1986 | 0,2571 | 0,2679 | 0,2763 | 0,257879 | 0,254932476 |
| HHI websites | 0,0875 | 0,0836 | 0,0921 | 0,076775264 | 0,1154 | 0,1289 | 0,1284 | 0,102061 | 0,115863652 |