Min function

(Excel 2000 Question)
I am developing a questionnaire where some but not all of the questions may be filled out.

In my example, the following equation;

=MIN('Questionnaire One'!E17,'Questionnaire Two'!E17,'Questionnaire Three'!E17,'Questionnaire Four'!E17,'Questionnaire Five'!E17,'Questionnaire Six'!E17,'Questionnaire Seven'!E17,'Questionnaire Eight'!E17,'Questionnaire Nine'!E17,'Questionnaire Ten'!E17)

Will return data such as 1,3,5,4,3,1,0,0,0,0.

I want my Min function to return 1 as a min (in the above example data, therefore ignoring the 0's. As you can see, the data is coming from different sheets.

Thanks for the help.

Rich