This question clearly needs 'figures' from a reliable source (a government-funded study perhaps) to be answered accurately. But since there's no such statistics, this remains an "inexact science".
And while spoon-related deaths have not been documented, there are a number of isolated cases wherein the alleged cause of death, injury and killings is a spoon. Refer to the links below to read the stories:
• Daily Mail - Florida killer who murdered prison guard with spoon executed
• The Guardian - Alabama man with spoon killed by officer had a 'mental episode', police say
• Daily Mail - Chinese student swallows 14cm long METAL SPOON by accident while eating ice cream
• Mid-Day.com - Thane: Mental hospital patient kills another with spoon
• mySanAntonio.com - Bexar inmate kills himself with plastic spoon
• Metro - Woman swallows spoon by accident
The Centers for Disease Control and Prevention (CDC) recently released a report, “The Most Distinctive Causes of Death by State, 2001-2010,” detailing causes of death most out of proportion to national rates. In some states, the results are intuitive. In others, unusually common causes of death are much more surprising.
These are the most unusual causes of death in each state and the District of Columbia, featured at 247wallst.com.
If you see someone who has collapsed, you need to confirm whether they are unconscious and breathing or unconscious and not breathing. Here's how to deal with someone who is unconscious shared by Patient.info.