For those that are interested I did a quick calculation to determine the average shareholding of each shareholder using the annual report from 30 June 2013
Total shares on issue: 724,000,000 Top 20 shareholders: 273,000,000 Balance: 451,000,000
1 to 1000 (90 holders) = 90 shares to 90,000 1001 to 5000 (41 holders) = 41,001 shares to 205,000 5001 to 10000 (102 holders) = 510,102 shares to 1,020,000 10001 to 100000 (681 holders) = 6,810,681 shares to 68,100,000 Total = 7,361,874 to 69,415,000 100001 and over (682 holders) 559,508 shares to 650,495*