Reddit reviews Comparative Criminal Justice Systems

It's extremely difficult to get accurate numbers and there is little political interest in finding out. Oregon State authorities sat on 5,000 untested rape kits until last year. Other states still have backlogs.

...And there is no reason to believe Saudi Arabia's officially reported statistics are accurate at all. See:

1. Sam Souryal's The Religionization of a Society: The Continuing Application of Shariah Law in Saudi Arabia
   
   
2. Badr El-Din Ali's Islamic Law And Crime: The Case Of Saudi Arabia
   
   
3. As Comparative Criminal Justice Systems explains: "crime is often under-reported in Saudi crime statistics because the Shari'a promotes informal and nonlegalistic responses to criminal behavior."