An iPhone developer anonymously recorded iPhone users’ numerical passcodes. Using statistical analysis i.e. mode and average, he created a list of the ten most common PIN.
Because I am concerned about unintentionally selecting a number or password with meaning I use a random number generator to create a PIN. I still have a bias; however, because I dismiss numbers like 7777 or 1234 even thought they arise randomly. The most common numbers are listed below. Every phone, GPS, and garage keypad I come across will experience me entering these numbers.
Also of note, 1990 – 2000 were in the top 50 passwords and 1980 – 1989 were in the top 100.