T
Tony Raven
Guest
Just for fun I took the graphs of head injury rates amongst cyclists in
Western Australia and New Zealand and removed all traces of dates etc. I've
posted them at http://www.cycling.raven-family.com/Helmet%20Graphs.jpg
Without the hints on the original graphs, can you spot when
the mandatory helmet law was introduced? Answers in ticks
from the left on a postcard without cheating and looking up
the originals.
Thought it would make a good challenge for the Swampmonster
to ask her to point it out if the opportunity ever arose.
Tony
Western Australia and New Zealand and removed all traces of dates etc. I've
posted them at http://www.cycling.raven-family.com/Helmet%20Graphs.jpg
Without the hints on the original graphs, can you spot when
the mandatory helmet law was introduced? Answers in ticks
from the left on a postcard without cheating and looking up
the originals.
Thought it would make a good challenge for the Swampmonster
to ask her to point it out if the opportunity ever arose.
Tony