How much water, out of the total water evaporated from the oceans, is available to terrestrial ecosystem?

Out of the total water evaporated from the oceans, 10% of water is available to terrestrial ecosystems.
The ocean plays a key role in this vital cycle of water. The ocean holds 97% of the total water on the planet; 78% of global precipitation occurs over the ocean, and it is the source of 86% of global evaporation.
Water controls the dynamics of terrestrial ecosystems directly, as a resource for the biota, and indirectly, as a driver for abiotic processes on the Earth's surface, in the atmosphere, and belowground.