vl.markLine()
.data(jobs)
.transform(
vl.calculate("floor(datum.year / 10) * 10").as("decade")
)
.encode(
vl.x().fieldO("decade").title("decade"),
vl.y().sum("count").title("Job count"),
vl.color().fieldN("job").title("Types of job"),
vl.detail().fieldN("job")
)
.width(800)
.height(400)
.render()