You have several possibilities in filemaker depending on your values and the structure of your tables.
One method is to use two fields for this.
Field1: Column > 0.9 (this field will return 1 for every record where column is greater than or equal to 0.9)
Field 2; Summary, Total of Field 1 (this will give you the total number of records where the expression in field 1 is true)
There are also ways to set up a summary report with sub summary parts (or a chart with the same sub totals) that would use a Count of Summary field and sorting to group your records by the value to be sub-totaled.
Thank you Phil!
The first method works great, and much much faster than Numbers:-)