Нужно вставить одно слово It is a well-known fact that teenagers today have greatest spending power (1)... they used

It is a well-known fact that teenagers today have greatest spending power than they used to have. It seems the more money they get, the faster they spend it. Nowadays another common trend is teenagers with credit cards. It is not unusual to see them spend large sums of money on clothes which are then paid for by their parents.