While the Philippine Atmospheric, Geophysical and Astronomical Services Administration assigned names to tropical cyclones which moved into or form as a tropical depression in their area of responsibility between 135°E and 115°E and between 5°N and 25°N even if the cyclone has had a name assigned to it by the Japan Meteorological Agency. Tropical depressions that were monitored by the United States' Joint Typhoon Warning Center were given a number with a "W" suffix. On average, 27 storms form in this basin every year.