Year Country #1 Com Air PD Off Cha A-B Number available 122 66 27 36 19 36   Too expensive -14 0 0 -2 -1 0   Number sought 108 66 27 34 18 36   Collected 82 36 16 19 9 25   %age 74% 53% 59% 53% 50% 67% C-E Number available 121 55 37 42 27 42   Too expensive -8 0 -2 -2 -1 0   Number sought 112 55 35 40 26 42   Collected 77 27 17 22 13 23   %age 68% 44% 49% 55% 50% 55% F-G Number available 105 51 36 35 13 46   Too expensive -12 0 -1 -2 0 0   Number sought 93 51 35 33 13 46   Collected 66 27 25 21 5 25   %age 70% 49% 67% 60% 31% 54% H-K Number available 121 55 25 45 24 31   Too expensive -7 -1 -2 -2 -2 0   Number sought 114 54 23 43 22 31   Collected 75 25 11 7 11 13   %age 65% 41% 48% 16% 50% 42% L-M Number available 64 43 33 33 14 32   Too expensive -3 0 -1 0 0 0   Number sought 80 43 32 33 14 32   Collected 61 16 11 13 3 14   %age 76% 37% 34% 39% 21% 44% N-Q Number available 110 62 30 42 34 35   Too expensive -10 -1 -2 -1 -2 -1   Number sought 100 61 28 41 32 34   Collected 65 28 23 19 7 12   %age 65% 46% 82% 46% 22% 35% R-S Number available 130 66 41 35 25 45   Too expensive -13 0 -2 0 0 0   Number sought 117 66 39 35 25 45   Collected 82 34