Which PL side are missing a No 9 the most?

The January transfer window has been and gone, meaning clubs must make do with what they have until the summer, but it is clear a number of them are still being hampered by suboptimal play in the final third.

Which PL side are missing a No 9 the most?
The January transfer window has been and gone, meaning clubs must make do with what they have until the summer, but it is clear a number of them are still being hampered by suboptimal play in the final third.