<bi:chart source="main" type="bar">
<bi:title>Patient Trends<bi:title>
<bi:axis type="time" data="date" format="yyyy-MM" label="Month"/>
<bi:dataset label="Males" aggregate="sum" fill="true"
backgroundColor="rgba(0,0,255,0.5)">gender == 'M' ? 1 : 0</bi:dataset>
<bi:dataset label="Females" aggregate="sum" fill="true"
backgroundColor="rgba(0,255,0,0.5)">gender == 'F' ? 1 : 0</bi:dataset>