Pie chart demos

      pie title Pets adopted by volunteers
        accTitle: simple pie char demo
        accDescr: pie chart with 3 sections: dogs, cats, rats. Most are dogs.
        "Dogs": 386
        "Cats": 85
        "Rats": 15
    

      %%{init: {"pie": {"textPosition": 0.9}, "themeVariables": {"pieOuterStrokeWidth": "5px"}}}%%
      pie
        title Key elements in Product X
        accTitle: Key elements in Product X
        accDescr: This is a pie chart showing the key elements in Product X.
        "Calcium": 42.96
        "Potassium": 50.05
        "Magnesium": 10.01
        "Iron": 5