I don't understand how these electricity production numbers are to be understood. Neither net nor gross energy production seem to match the numbers depicted for

I don't understand how these electricity production numbers are to be understood. Neither net nor gross energy production seem to match the numbers depicted for Germany. Why does it say, that Germany is producing 61% of its power from wind energy, when most other sources only report around 40%? https://www.cleanenergywire.org/sites/default/files/styles/lightbox_image/public/images/factsheet/fig2-gross-power-production-germany-1990-2017-1.png?itok=klV3qdJ3 https://www.cleanenergywire.org/sites/default/files/styles/l... https://www.cleanenergywire.org/sites/default/files/styles/lightbox_image/public/images/factsheet/fig1-installed-net-power-generation-capacity-germany-2002-2016.png?itok=CA958Qku https://www.cleanenergywire.org/sites/default/files/styles/l...