There are lies, damned lies, and statistics, and I have insufficient information to form an opinion on into which category these data fall.
Where do these statistics come from? By whom is it 'known'? If only 23,000 out of 80,000 'serious' injuries are reported to the police, what is defined as a 'serious' injury? Why are the rest not reported?
In other words, it is estimated that more than one in every thousand of the total population of the UK is a road casualty every year. At first reaction this sounds like nonsense. Who estimates this figure, on the basis of what data? What is the definition of a 'road casualty'?
Tell all.....
"Department for Transport Reported Road Casualties Statistical Release September 2013
Key definitions
(a full list of definitions can be found at the link above)
Accident:
Involves personal injury occurring on the public highway (including footways) in which at least
one road vehicle or a vehicle in collision with a pedestrian is involved and which becomes known to the
police within 30 days of its occurrence. Damage-only accidents, with no human casualties or accidents on
private roads or car parks are not included The data are collected by police at the scene of an accident
or in some cases reported by a member of the public at a police station.
Casualty:
A person killed or injured in an accident. Casualties are sub-divided into killed, seriously injured
and slightly injured
Fatal accident
: An accident in which at least one person is killed; other casualties (if any) may have
serious or slightly injuries.
Killed:
Human casualties who sustained injuries which caused death less than 30 days (before 1954,
about two months) after the accident. Confirmed suicides are excluded.
Serious accident
One in which at least one person is seriously injured but no person (other than a
confirmed suicide) is killed.
Serious injury:
An injury for which a person is detained in hospital as an “in-patient”, or any of the
following injuries whether or not they are detained in hospital: fractures, concussion, internal injuries,
crushings, burns (excluding friction burns), severe cuts, severe general shock requiring medical treatment
and injuries causing death 30 or more days after the accident. An injured casualty is recorded as seriously
or slightly injured by the police on the basis of information available within a short time of the accident. This
generally will not reflect the results of a medical examination, but may be influenced according to whether
the casualty is hospitalised or not. Hospitalisation procedures will vary regionally.
Slight accident
One in which at least one person is slightly injured but no person is killed or seriously
injured.
Slight injury:
An injury of a minor character such as a sprain (including neck whiplash injury), bruise or cut
which are not judged to be severe, or slight shock requiring roadside attention. This definition includes
injuries not requiring medical treatment.
Most of the statistics in the report are based on information about accidents reported to the police. However, other sources such as mortality, national travel survey, coroners’ reports and data from the Home Office and Ministry of Justice, are also used as well as population and traffic data to provide a wider context."
As for the disparity between serious injury accidents reported to the police and serious injury accidents not reported to the police, perhaps the data come from insurance companies. There will be a wide dissimilarity as accidents are perhaps more likely to be reported to an insurance company. Like you I find the disparity surprising.