<c3 width=100% height=400px>
data: { x: 'x', columns: [ ['x',1972,1992,1996,2000,2004,2008,2012,2016], ['K1-women',22,26,30,20,19,21,21,21], ['C1-men',22,31,30,16,16,16,17,19], ['C2-men',19,17,15,12,12,12,14,19], ['K1-men',37,44,44,23,25,21,22,21]
], types: { K1-women: 'area', C1-men: 'area', C2-men: 'area', K1-men: 'area', }, groups: [['K1-women','C1-men','C2-men','K1-men']], axis: { x: { type: 'category', categories: ['1972','1992','1996','2000','2004','2008','2012','2016',] } } }
</c3>
<c3 width=100% height=400px>
data: { x: 'x', columns: [ ['x'],
], types: { }, groups: []], axis: { x: { type: 'category', categories: [] } } }
</c3>