PIN codes – the four-digit number you use to access electronic devices or access things like ATMs – have become a common part of our everyday lives. But how secure is your number? It’s likely much less than you think, according to a recent analysis by the Australian Broadcasting Company.

ABC analyzed 29 million PIN codes from “Have I Been Pwned?” a data-breach tracking site. The study showed almost one in 10 people use the same four-digit PIN, making them easier for scammers to guess and potentially exposing your personal information and money.

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“If someone wants to unlock a stolen phone – or retrieve money from an ATM – and only have five guesses, this data suggests they still have a one-in-eight chance of guessing correctly,” ABC noted.

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The most common PIN, used by 9% of the accounts include in the analysis, was 1234. It was followed by 1111, 0000 and 1342. Birth years also appeared to be popular with 1986 and 1989 both making an appearance.

Here’s a look at the 20 PIN codes you should avoid:

1. 1234

2. 1111

3. 0000

4. 1342

5. 1212

6. 2222

7. 4444

8. 1122

9. 1986

10. 2020

11. 7777

12. 5555

13. 1989

14. 9999

15. 6969

16. 2004

17. 1010

18. 4321

19. 6666

20. 1984

You can see the remainder of the list here.