Is the number of swamps on the ground increasing, decreasing, or unchanged?

The number of swamps on our planet has decreased significantly over the past couple of decades. And this led to the flooding of many cities with rivers, the amount of drinking water supplies has decreased, fires constantly break out at lightning speed in peat bogs, rivers are shallower. At the present time, many countries are engaged in the artificial restoration of swamps, but this process is not entirely successful.