{
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        {
            "filter": "datum.symbol !== 'GOOG'"
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    ],
    "height": 100,
    "mark": "rect",
    "data": {
        "url": "https://vega.github.io/vega-lite/data/stocks.csv"
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    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "encoding": {
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            "field": "price",
            "aggregate": "sum",
            "title": "Price",
            "type": "quantitative"
        },
        "x": {
            "field": "date",
            "timeUnit": "yearmonthdate",
            "title": "Time",
            "type": "ordinal",
            "axis": {
                "labelAngle": 0,
                "labelOverlap": false,
                "format": "%Y",
                "labelColor": {
                    "value": null,
                    "condition": {
                        "value": "black",
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                            "equal": {
                                "date": 1,
                                "month": 1
                            },
                            "field": "value",
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}