What is the acceptance rate for M.Div. applicants to the Institute of
Sacred Music at Yale?

Their web site <http://www.yale.edu/ism/> seems to be devoid of any
information along these lines. If you can't find the acceptance rate
for M.Div. applicants specifically, the rate for all Divinity School
applicants to the ISM would be fine, or (as a last resort) the general
acceptance rate for all ISM applicants (including both Divinity and
Music).