Biggest Table Row

/* You are given an HTML table with 4 columns: Town, Store1, Store2 and Store3. It consists of sequence of text lines: the "<table>" tag, the header row, several data rows, and "</table>" tag (see the examples below). The Store1, Store2, and Store3 columns hold either numbers or "-" (which means "no data"). Your task is to write a program which parses the table data rows and finds the row with a maximal sum of its values.
 * The input is read from the console on several lines, each holding the table rows. The last row will always hold the string "</table>".
 * Print at the console a single line, holding the data row values with maximal sum in format: "sum = value1 + value2 + …". Print the values exactly as they were found in the input (no rounding, no reformatting). If all rows contain no data, print "no data". If two rows have the same maximal sum, print the first of them. */

namespace Biggest_Table_Row
{
    using System;
    using System.Collections.Generic;
    using System.Text.RegularExpressions;

    class BiggestTableRow
    {
        static void Main(string[] args)
        {
            const string pattern = @"<tr><td>[A-Za-z]+<\/td><td>([\d.-]+)<\/td><td>([\d.-]+)<\/td><td>([\d.-]+)<\/td><\/tr>";
            Dictionary<double, List<string>> rowSums = new Dictionary<double, List<string>>();
            double maxSum = Double.MinValue;
            Regex rgx = new Regex(pattern);
            string inputLine = Console.ReadLine();
            int lineCounter = 0;
            while (inputLine != "</table>")
            {
                if (lineCounter > 1)
                {
                    List<string> valuesList = new List<string>();
                    Match match = rgx.Match(inputLine);
                    double sum = 0;
                    for (int i = 1; i < 4; i++)
                    {
                        if (match.Groups[i].Value == "-") continue;

                        sum += double.Parse(match.Groups[i].Value);
                        valuesList.Add(match.Groups[i].Value);
                    }

                    if (valuesList.Count > 0)
                    {
                        if (!rowSums.ContainsKey(sum) && sum > maxSum)
                        {
                            rowSums.Add(sum, valuesList);
                            maxSum = sum;
                        }
                    }
                }

                lineCounter++;
                inputLine = Console.ReadLine();
            }

            if (rowSums.Count == 0)
            {
                Console.WriteLine("no data");
            }
            else
            {
                Console.WriteLine("{0} = {1}",
                maxSum, string.Join(" + ", rowSums[maxSum]));
            }
        }
    }
}