How many people keep diary

I just wonder how many people keep diary nowadays. Sometimes I can say to myself yeah I should keep a dairy because 10 years from now I am not able to recall all the happiness in my life. Perhaps I also said to myself why dairy why not use this digital video camera that my husband bought few years ago. Well anyhow, I just thought about it nothing special. Maybe I should keep a diary like when I was seven years old. As you know when I was a kid every time I feel sad or mad I will always get my notebook and start writing and I don’t know what did I do with that note book I just don’t remember.