ICOADS Web information page (Wednesday, 06-May-2009 23:50:32 UTC):

Release 2.5 WSPD Coverage Maps

Note: Counts for the three partial decades (1854-59, 2000-06, and 2000-07) were adjusted (/10 x years) to be comparable to the full decades (also the January-May 2007 portion of Release 2.4 was not plotted).
color bar 1800s WSPD 2.4 1800s WSPD 2.5
1810s WSPD 2.4 1810s WSPD 2.5
1820s WSPD 2.4 1820s WSPD 2.5
1830s WSPD 2.4 1830s WSPD 2.5
1840s WSPD 2.4 1840s WSPD 2.5
1850s WSPD 1 1850s WSPD 2.4 1850s WSPD 2.5
1860s WSPD 1 1860s WSPD 2.4 1860s WSPD 2.5
1870s WSPD 1 1870s WSPD 2.4 1870s WSPD 2.5
1880s WSPD 1 1880s WSPD 2.4 1880s WSPD 2.5
1890s WSPD 1 1890s WSPD 2.4 1890s WSPD 2.5
1900s WSPD 1 1900s WSPD 2.4 1900s WSPD 2.5
1910s WSPD 1 1910s WSPD 2.4 1910s WSPD 2.5
1920s WSPD 1 1920s WSPD 2.4 1920s WSPD 2.5
1930s WSPD 1 1930s WSPD 2.4 1930s WSPD 2.5
1940s WSPD 1 1940s WSPD 2.4 1940s WSPD 2.5
1950s WSPD 1 1950s WSPD 2.4 1950s WSPD 2.5
1960s WSPD 1 1960s WSPD 2.4 1960s WSPD 2.5
1970s WSPD 1 1970s WSPD 2.4 1970s WSPD 2.5
1980s WSPD 2.4 1980s WSPD 2.5
1990s WSPD 2.4 1990s WSPD 2.5
2000s WSPD 2.4 2000s WSPD 2.5

[Documentation and Software][Release 2.5 Data Characteristics]

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Updated: May 6, 2009 23:50:32 UTC
http://www.icoads.noaa.gov/r2.5wspd.html