private void TypingSpeed_MistakesCount()
        {
            mistakesList.Clear();
            for (int i = 0; i < 10000; i += 50)
            {
                string query          = string.Format("SELECT  COUNT(id) FROM MistakesView WHERE typing_speed between {0} and {1} {2}", i + 1, i + 50, whereAnd);
                int    mistakes_count = DBUtils.ExecuteScalar(query);
                //double speed = (double)(i + 50) / (double)1000;

                if (mistakes_count != 0)
                {
                    double speed = (double)1000 / (double)(i + 50);
                    TypingSpeed_MistakesCount typS = new TypingSpeed_MistakesCount(Math.Round(speed, 2), mistakes_count);
                    mistakesList.Add(typS);
                }
            }
            PercentageCalc();
            isLoadedMistakes = true;
        }
        private void PercentageCalc()
        {
            int totalCount = 0;

            foreach (var item in mistakesList)
            {
                totalCount += item.mistakesCount;
            }

            List <TypingSpeed_MistakesCount> tempList = new List <TypingSpeed_MistakesCount>();

            foreach (var item in mistakesList)
            {
                double percentage = (item.mistakesCount / (double)totalCount) * 100;
                if (percentage >= 0.5)
                {
                    TypingSpeed_MistakesCount newItem = new TypingSpeed_MistakesCount(Math.Round(item.speed, 1), item.mistakesCount, Math.Round(percentage, 1));
                    tempList.Add(newItem);
                }
            }
            mistakesList = tempList;
        }