Calculate % for sum of a variable by number of members in a dataset

[texasmfp]

I have a dataset with a variable called "SIGNIFICANT".  The value for this variable is either 1 or 0.  I want to sum the values for SIGNIFICANT and calculate the % of this sum by the total number of members in the dataset.  For example, the following data has 10 observations.  The sum of the SIGNIFICANT field is 3, so I am looking to calculate 30%.

Model	significant
Model1	0
Model2	1
Model3	0
Model4	1
Model5	0
Model6	0
Model7	0
Model8	0
Model9	0
Model10	1

[Kurt_Bremser · Accepted solution]

proc sql;
select
  sum(significant) / count(*) as percent format=percent7.2
from have;
quit;