Update app.py

app.py

@@ -13,9 +13,8 @@ with st.sidebar:
     
     year_list = list(df.Year.unique())[::-1]
     
-    selected_year = st.selectbox('Select a year', year_list, index=len(year_list)-1)
+    selected_year = st.selectbox('Select a year', year_list.sort(), index=len(year_list)-1)
     df_selected_year = df[df.Year == selected_year]
-    df_selected_year_sorted = df_selected_year.sort_values(by="Year")
 
     color_theme_list = ['blues', 'cividis', 'greens', 'inferno', 'magma', 'plasma', 'reds', 'rainbow', 'turbo', 'viridis']
     selected_color_theme = st.selectbox('Select a color theme', color_theme_list)