Percentage of kids allergic to PCV vaccine

Life-threatening allergic reactions from vaccines are very rare. If they do occur, it would be within a few minutes to a few hours after the vaccination.
What if there is a severe reaction? What should I look for?
Any unusual condition, such as a high fever or behavior changes. Signs of a severe allergic reaction
can include difficulty breathing, hoarseness or wheezing, hives, paleness, weakness, a fast heart
beat or dizziness.
What should I do?
• Call a doctor, or get the person to a doctor right away.<"

The information here from the drug company and the government simply says that an allergic reaction is "very rare".

">Children should not get PCV13 if they had a serious (life-threatening) allergic reaction to a previous dose of this vaccine, to PCV7, or to any vaccine containing diphtheria toxoid (for example, DTaP). Children who are known to have a severe allergy to any component of PCV7 or PCV13 should not get PCV13. Tell your health care provider if your child has any severe allergies.
Children with minor illnesses, such as a cold, may be vaccinated. But children who are moderately or severely ill should usually wait until they recover before getting the vaccine.<"

http://children.webmd.com/vaccines/pneum...
http://www.cdc.gov/vaccines/vac-gen/side...
http://www.cdc.gov/vaccines/pubs/vis/dow...