You can use this SQL query to return the information, you'd have to create a UR or CABI report with it though. You should only need to modify line 28.
DECLARE @SQL NVARCHAR(1000)
DECLARE @RTABLE VARCHAR(50)
SET @RTABLE = (select distinct r_Table from S_QOS_DATA where qos='qos_url_response')
SET @SQL = '
select
[Target],
[Available],
[NotAvailable],
CAST(CAST([Available] * 100.0 AS Numeric(10,2)) / sum([Available]+[NotAvailable]) as Numeric(10,2)) as [Percentage]
from
(
select s.target as [Target],
sum(case when [value] IS NOT NULL then 1 else 0 end) as [Available],
sum(case when [value] IS NULL then 1 else 0 end) as [NotAvailable]
from S_QOS_DATA s
join (select
DATEPART(yyyy, r.sampletime) as [sampleyear],
DATEPART(mm, r.sampletime) as [samplemonth],
DATEPART(dd, r.sampletime) as [sampleday],
r.samplevalue as [value],
r.sampletime as [time],
r.table_id
from ' +@RTABLE+ ' r
join (select distinct table_id from ' + @RTABLE + ') rr
on r.table_id = rr.table_id
) rx
on s.table_id = rx.table_id
where s.target like ''%tix%''
group by s.target
) b
group by b.target,b.Available,b.NotAvailable
'
EXECUTE sp_executesql @SQL