Spline trend continuous data with annotations: NASA Budget as a % of Fed Budget

author(s): Mustapha Mekhatria

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<script src="https://code.highcharts.com/modules/accessibility.js"></script>
<script src="https://code.highcharts.com/modules/annotations.js"></script>

<div id="container"></div>

CSS

.highcharts-figure,
.highcharts-data-table table {
    min-width: 310px;
    max-width: 800px;
    margin: 1em auto;
}

#container {
    height: 400px;
}

.highcharts-data-table table {
    font-family: Verdana, sans-serif;
    border-collapse: collapse;
    border: 1px solid var(--highcharts-neutral-color-10, #e6e6e6);
    margin: 10px auto;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

.highcharts-data-table caption {
    padding: 1em 0;
    font-size: 1.2em;
    color: var(--highcharts-neutral-color-60, #666);
}

.highcharts-data-table th {
    font-weight: 600;
    padding: 0.5em;
}

.highcharts-data-table td,
.highcharts-data-table th,
.highcharts-data-table caption {
    padding: 0.5em;
}

.highcharts-data-table thead tr,
.highcharts-data-table tbody tr:nth-child(even) {
    background: var(--highcharts-neutral-color-3, #f7f7f7);
}

JavaScript

Highcharts.chart('container', {
    chart: {
        type: 'spline',
        zooming: {
            type: 'xy'
        }
    },
    title: {
        text: 'NASA Budget as a % of Fed Budget'
    },
    subtitle: {
        text:
        'Source <a href="https://en.wikipedia.org/wiki/Budget_of_NASA" target="_blank">Wikipedia</a>'
    },
    xAxis: {
        crosshair: true,
        title: {
            text: 'Year'
        },
        plotLines: [
            {
                color: '#f15c80',
                dashStyle: 'dot',
                width: 2,
                value: 1957,
                label: {
                    y: 15,
                    text: 'USSR: Sputnik 1'
                },
                zIndex: 3
            },
            {
                color: '#f15c80',
                dashStyle: 'dot',
                width: 2,
                value: 1961,
                label: {
                    // y:15,
                    text: 'USSR: First human spaceflight'
                }
            },
            {
                color: '#f15c80',
                dashStyle: 'dot',
                width: 2,
                value: 1970,
                label: {
                    text: 'USSR: First lunar rover'
                }
            },
            {
                color: '#f15c80',
                dashStyle: 'dot',
                width: 2,
                value: 1961,
                label: {
                    // y:15,
                    text: 'USSR: First human spaceflight'
                }
            },
            {
                color: '#7cb5ec',
                dashStyle: 'dot',
                width: 2,
                value: 1973,
                label: {
                    text: 'US: First Jupiter flyby'
                }
            },
            {
                color: '#f15c80',
                dashStyle: 'dot',
                width: 2,
                value: 1986,
                label: {
                    text: 'USSR:...