Why were Scud casualties so low?

@article{Fetter1993WhyWS,
  title={Why were Scud casualties so low?},
  author={S. Fetter and G. Lewis and L. Gronlund},
  journal={Nature},
  year={1993},
  volume={361},
  pages={293-296}
}
Patriot missiles were returned to the Gulf last week. But they were not the reason for the unexpectedly low casualty rate when Saddam attacked Israel with Scud missiles in 1991. 
Civilian casualties of Iraqi ballistic missile attack to Tehran, capital of Iran.
Applying NIMH‐FEMA Formulas to the Gulf War in Israel
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