Can someone please tell me how many new cases of tinnitus there are in
the U.S. annually?

I have seen that 50 million Americans suffer from tinnitus and 12
million seek treatment (also that tinnitus interferes with normal
daily activities in 1 to 2 million people), but what I want to know is
how many new cases of tinnitus are there each year and how many of
these new cases seek medical treatment each year.