Highcharts.chart('container', {
    chart: {
        type: 'area'
    },
    title: {
        text: 'Production, consumption and trade surplus of electrical power'
    },
    subtitle: {
        text: 'Source: <a ' +
            'href="https://www.ssb.no/energi-og-industri/energi/statistikk/elektrisitet/artikler/lavere-kraftproduksjon"' +
            ' target="_blank">SSB</a>'
    },
    xAxis: {
        categories: [
            'Q1 2019', 'Q2 2019', 'Q3 2019', 'Q4 2019', 'Q1 2020', 'Q2 2020',
            'Q3 2020', 'Q4 2020', 'Q1 2021', 'Q2 2021', 'Q3 2021'
        ]
    },
    yAxis: {
        title: {
            text: 'TWh'
        }
    },
    credits: {
        enabled: false
    },
    series: [{
        name: 'Total production',
        data: [
            37.8, 29.3, 30.8, 36.8, 40.5, 35.3, 34.9, 43.6, 45.7, 35.9, 32.7
        ]
    }, {
        name: 'Gross consumption',
        data: [
            39.9, 29.9, 26.7, 38.1, 39.3, 30.2, 27.5, 36.7, 42.7, 31.4, 27.5
        ]
    }, {
        name: 'Trade surplus',
        data: [-2.2, -0.6, 4.1, -1.3, 1.2, 5.1, 7.4, 6.9, 2.9, 4.5, 5.2]
    }]
});