[fun] pari source code age

[Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>]

Hello PARI-dev,

using cvs annotate I computed the ages of every line of code in PARI
CVS (in src only).

Unfortunately the CVS start at 1999.

Here the result:

pari% cvs annotate src 2>/dev/null | grep "99):"|wc
year:  nb of lines:   %
<=1999:  47104    :  28.84%
  2000:   5667    :   3.47%
  2001:  10354    :   6.34%
  2002:  21360    :  13.08%
  2003:  22193    :  13.59%
  2004:  26816    :  16.41%
  2005:  29824    :  18.26%
 total:  163318   : 100.00%

Of course it should be taken with a grain of salt, a line being changed
does not mean the code being fundamentally altered (whitespace change,
function renamed, etc.)

Cheers,
Bill.