score:1

Accepted answer

Assign your groupPadding value very close to zero (or zero).

plotOptions: {
        series: {
            groupPadding: 0.01
        }
    },

Since you didn't post your code, I'll show another example

score:1

You can increase the column width by using pointWidth and shrink the spaces between years using groupPadding.

http://api.highcharts.com/highcharts#plotOptions.column.pointWidth

plotOptions: {
        series: {
            groupPadding: 0.01,
            pointWidth: 50
        }
    }

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