Update README for download

README.md

@@ -38,11 +38,14 @@ The questions test the understanding of Buddhist principles through analytical t
 
 ## Usage
 
+You can use `datasets` to download exam in all years as shown below or download individual CSV file from `data` folder.
+
 ```py
 from datasets import load_dataset
 
-exam_dataset = load_dataset("biodatlab/thai_buddhist_studies_exam")  # no splitting
-exam_dataset["train"][0]
+exam_dataset = load_dataset("biodatlab/thai_buddhist_studies_exam")  # all exam
+exam_dataset_2023 = exam_dataset.filter(lambda e: e["year"] == 2023)  # filter only the latest year
+exam_dataset_2023["train"][0]  # no data splitting, only train
 ```
 
 ```py