Additionally, determining the exact percentage of the global population experiencing depression can be challenging due to factors like underreporting, varying definitions and diagnostic criteria for depression, and differences in data collection methods across different countries and regions.
However, it's worth noting that depression is a prevalent mental health condition worldwide. According to the World Health Organization (WHO) estimates from 2017, more than 264 million people of all ages were living with depression globally. It is also considered one of the leading causes of disability worldwide.
Keep in mind that these numbers might have changed since 2017, and for the most current data, I recommend consulting reputable sources like the WHO or other reputable health organizations that regularly conduct research and provide updated information on mental health conditions.