How to sort array of object by string of numbers and special characters

I have an array of some objects and I want to sort them by dimension property, where that property is a string of some number intervals and special characters. Here is the example of what I have

let data = [
  {
    "soldTickets": 206,
    "soldRevenue": 12825.309997558594,
    "playedOffTickets": 2915,
    "playedOffRevenue": 495923.22019958496,
    "dimension": "10 - 25",
    "ticketsChange": -2709,
    "revenueChange": -483097.91020202637
  },
  {
    "soldTickets": 172,
    "soldRevenue": 17174.29998779297,
    "playedOffTickets": 2485,
    "playedOffRevenue": 467017.27951049805,
    "dimension": "25 - 50",
    "ticketsChange": -2313,
    "revenueChange": -449842.9795227051
  },
  {
    "soldTickets": 122,
    "soldRevenue": 9892.249984741211,
    "playedOffTickets": 9121,
    "playedOffRevenue": 1129196.3203125,
    "dimension": "> 200",
    "ticketsChange": -8999,
    "revenueChange": -1119304.0703277588
  },
  {
    "soldTickets": 52,
    "soldRevenue": 3159.239990234375,
    "playedOffTickets": 544,
    "playedOffRevenue": 88893.0400390625,
    "dimension": "0 - 10",
    "ticketsChange": -492,
    "revenueChange": -85733.80004882812
  },
  {
    "soldTickets": 38,
    "soldRevenue": 3162.1099700927734,
    "playedOffTickets": 476,
    "playedOffRevenue": 92432.79023742676,
    "dimension": "100 - 200",
    "ticketsChange": -438,
    "revenueChange": -89270.68026733398
  },
  {
    "soldTickets": 37,
    "soldRevenue": 3233,
    "playedOffTickets": 590,
    "playedOffRevenue": 97645.46026611328,
    "dimension": "50 - 100",
    "ticketsChange": -553,
    "revenueChange": -94412.46026611328
  }
];

const toNumber = (str) => {
  if (Number(str)) {
    return Number(str);
  } else {
    return Number(str.substring(0, str.length - 1));
  }
};

   data = data.sort(
        (a, b) =>
          toNumber(String(a["dimension"]).split(' ')[0]) -
          toNumber(String(b["dimension"]).split(' ')[0])
      );
      
  console.log(data)

The problem is that the array is not sorted the way I wanted, since the > 200 should be the last in this case instead of being the first. The desired order should be like this

['0 - 10', '10 - 25', '25 - 50', '50 - 100', '100 - 200', '> 200']

What am I doing wrong? Thanks in advance!