Fig. 1From: Changes in prevalence of psychotropic drug use and alcohol consumption among the elderly in Germany: results of two National Health Interview and Examination Surveys 1997-99 and 2008-11Prevalence of long-term psychotropic drug use among adults aged 60–79 years in Germany. National Health Interview and Examination Surveys GNHIES98 (1997–99) and DEGS1 (2008–11)Back to article page