public void report_year(List<Account> list1) {
			int current_year = 2017; //Current year of the bank
			int max_year = 4; //How many year to check
			int count_4 = 0; //Count how many 4 years acc
			foreach (Account x in list1) { //Init loop
				string first_date = x.date; //x.date assign to first_date for easier to do thing
				string[] date_split = first_date.Split('-'); //Split between text with ' - ' and then add each one to Array
				int date_selected = Int32.Parse(date_split[2]); //[20,6,2011] select the 3rd as it is the year and then convert to Int andddd then assign to date_selected
				int cal_date = current_year - date_selected; //Calculate
				if (cal_date > max_year) { //Check if it is more than 4 year
					Console.WriteLine("Account that has more than 4 year : "+x.name); //Write Name
					count_4++; //Increase counter
				}

			}
			Console.WriteLine("Number of account with more than 4 year of banking : " + count_4);