private List<StatisticDto> filterStatistic(List<StatisticDto> rawStatistic, long fromTimestamp, long toTimeStamp) {
		List<StatisticDto> filteredStatistic = new ArrayList<StatisticDto>();
		for (StatisticDto statisticDto : rawStatistic) {
			if (statisticDto.timestamp > fromTimestamp && statisticDto.timestamp < toTimeStamp) {
				filteredStatistic.add(statisticDto);
			}
		}
		return filteredStatistic;
	}