Streamgraph

using Deneb
data = Data(url="https://vega.github.io/vega-datasets/data/unemployment-across-industries.json")
chart = data * Mark(:area) * Encoding(
    "yearmonth(date):T",
    y=field("sum(count)", stack="center", axis=nothing),
    color=field("series", scale=(;scheme=:category20b))
)

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