Prescriptions for anti-depressant drugs such as Prozac rose by more than 40%

The BBC news web page has posted the following

"Economic problems may be fueling a rise in depression in England, it has been suggested.

Prescriptions for anti-depressant drugs such as Prozac rose by more than 40% over the past four years, data obtained by the BBC shows."

Well that sounds quite straight forward at first at first glance but maybe the raise is due to GP's changing from older types of medication to more modern ones such as selective serotonin reuptake inhibitor (SSRI ? i for one rather think this is the case .