mapping in categories

[unsadzadiac]

Hello guys,

I have a question: why can't I map an array to categories even though I seem to be doing everything correctly? For some reason, categories are displaying the numbering of the array like from 1 to 83, but I need to display the values that are stored in the array itself. I don't understand what I'm missing.

Here's my code snippet where I'm trying to pass the array to categories:

   xaxis:{
        categories: flatsBuiltByYearChartInfo?.map(item => item.builtYear.toString())|| [],
        tickAmount: 10
    }

Here's the array I obtained through the map:
['0', '1900', '1909', '1933', '1934', '1937', '1940', '1944', '1945', '1948', '1950', '1952', '1953', '1954', '1955', '1956', '1957', '1958', '1959', '1960', '1961', '1962', '1963', '1964', '1965', '1966', '1967', '1968', '1969', '1970', '1971', '1972', '1973', '1974', '1975', '1976', '1977', '1978', '1979', '1980', '1981', '1982', '1983', '1984', '1985', '1986', '1987', '1988', '1989', '1990', '1991', '1992', '1993', '1994', '1995', '1996', '1997', '1998', '1999', '2000', '2001', '2002', '2003', '2004', '2005', '2006', '2007', '2008', '2009', '2010', '2011', '2012', '2013', '2014', '2015', '2016', '2017', '2018', '2019', '2020', '2021', '2022', '2023']

But on the graph, it's displaying numbers from 1 to 83. Why is this happening?