Help***SAS - Fill missing value with the last non missing value variable

Hi,
I wanted to fill missing value with the last non missing value variable.
+----------+--------+-------+
| Variable | Level | Value |
+----------+--------+-------+
| | men | 10 |
|sexe | female | 20 |
| | 0-20 | 5 |
| | 20-40 | 5 |
| | 40-60 | 10 |
| age | >60 | 10 |
+----------+--------+-------+
And I would like to fulfill the "blank" cells using the last non-blank cell to obtain something like this.

+----------+--------+-------+
| Variable | Level | Value |
+----------+--------+-------+
| sexe | men | 10 |
| sexe | female | 20 |
| age | 0-20 | 5 |
| age | 20-40 | 5 |
| age | 40-60 | 10 |
| age | >60 | 10 |
+----------+--------+-------+