["Broome Pearlers", The Northern Times (Carnarvon, WA), Saturday 11 January 1913, page 8]

BROOME PEARLERS.

ASSOCIATION'S ANNUAL REPORT.

...

Average Price Per Ton realised for M.O.P. shell f.o.b. Broome for 23 years:--1890, £110; 1891, £110; 1892, £100; 1893, £85; 1894, £90; 1895, £100; 1896, £105; 1897, £105; 1898, £110; 1899, £115; 1900, £125; 1901, £150; 1902, £175; 1903, £205; 1904, £105; 1905, £105; 1906, £115; 1907, £125; 1908, £140; 1909, £180; 1910, £200; 1911, £220; 1912, £255.

notes:

steady rise in shell price 1904-05-06 (£105, 105, 115), but not to the level of 1903 (£205/ton)

What was the increase in the fleet over the same period?