diff --git a/exercises/day-01/datapop_shares_aus.csv b/exercises/day-01/datapop_shares_aus.csv
index 4cdeb6c..94336dd 100644
--- a/exercises/day-01/datapop_shares_aus.csv
+++ b/exercises/day-01/datapop_shares_aus.csv
@@ -1,4 +1,4 @@
-age,,female,male
+age,year,female,male
 80+,2023,-4.981383172,3.838150837
 80+,1960,-1.619326133,0.948079375
 75-79,2023,-3.598008745,3.384922516