Update app.py

app.py

@@ -12,8 +12,9 @@ with st.sidebar:
     st.title('ESG for All')
     
     year_list = list(df.Year.unique())[::-1]
+    year_list = sorted(year_list)
     
-    selected_year = st.selectbox('Select a year', year_list.sort(), index=len(year_list)-1)
+    selected_year = st.selectbox('Select a year', year_list, index=len(year_list)-1)
     df_selected_year = df[df.Year == selected_year]
 
     color_theme_list = ['blues', 'cividis', 'greens', 'inferno', 'magma', 'plasma', 'reds', 'rainbow', 'turbo', 'viridis']