/span>.map (.people &gt;&gt; toFloat) m ), ( <span class="hljs-number">1850</span>, <span class="hljs-type">List</span>.map (.people &gt;&gt; toFloat &gt;&gt; negate) f ) ]
    , extent =
        <span class="hljs-type">Statistics</span>.extent categories
            |&gt; <span class="hljs-type">Maybe</span>.map (\( a, b ) -&gt; ( toFloat a, toFloat b ))
            |&gt; <span class="hljs-type">Maybe</span>.withDefault ( <span class="hljs-number">0</span>, <span class="hljs-number">0</span> )
    }


<spa