Update README.md

README.md

@@ -100,7 +100,8 @@ ds = load_dataset("parquet", data_dir="data")
 
 ## Dataset Construction Pipeline
 
-We construct WAON dataset through the following steps:
+We construct WAON dataset through the following steps (The numbers in parentheses indicate the remaining data
+count after each processing step (based on the 2025-18 snapshot):
 <div align="center">
 <img src="waon-pipeline.svg" width="50%"/>
 </div>