Mainly amends numerical values in table 4 on page 7, table 10 on page 13, table 13 on page 16, table 16 on page 20, tables 17 and 18 on page 21, table 21 on pages 24 to 27, table 22 on page 28. Modifies curves in figures 1 and 3 on pages 34 and 36.