# The following example shows the populations for some animals
# over the years.
#
df = md.DataFrame(
    {
        "pig": [20, 18, 489, 675, 1776],
        "horse": [4, 25, 281, 600, 1900],
    },
    index=[1990, 1997, 2003, 2009, 2014],
)
lines = df.plot.line()