Streamgraph
<Plot
marginLeft={0}
x={{ grid: true }}
y={{ axis: false }}
color={{ legend: true }}>
<AreaY
data={riaa}
x="year"
y="revenue"
z="format"
curve="basis"
fill="group"
opacity={0.8}
stack={{ offset: 'wiggle', order: 'inside-out' }} />
</Plot>