private double getCreditRating(Player player) {
		double interestToReturn = 0;
		//Daten auslesen
		Vector<PlayerData> data = player.getData();
		double playerCash = player.getCash();
		Vector<LongTimeCredit> creditsOfPlayer = player.getCredits();
		double totalAmountOfCredits = 0;
		double debtRatio = totalAmountOfCredits/(totalAmountOfCredits + playerCash);
		
		for (LongTimeCredit credit : creditsOfPlayer) {
			totalAmountOfCredits += credit.getAmount();
		}
		
		//Vertikale Finanzierungsregeln lt. Finanzierungsskript
		if(debtRatio < 0.5)
		{
			interestToReturn = 0.09;
		} else if(0.5 < debtRatio && debtRatio < 0.66){
			interestToReturn = 0.11;
		} else if(0.66 < debtRatio && debtRatio < 0.75){
			interestToReturn = 0.13;
		} else {
			interestToReturn = 0.14;
		}
		
		return interestToReturn;
	}