Data types analyzed/mined in the past 12 months

Types of Data Analyzed/Mined in the past 12 months [144 voters]
table data (fixed # of columns) (102)	70.8%
time series (56)	38.9%
itemsets / transactions (52)	36.1%
text (free-form) (43)	29.9%
anonymized data (38)	26.4%
social network data (28)	19.4%
other (22)	15.3%
web content (19)	13.2%
XML data (17)	11.8%
web clickstream (15)	10.4%
email (15)	10.4%
images / video (11)	7.6%
music / audio (3)	2.1%

Comparing with a similar 2009 KDnuggets Poll: Types of Data Analyzed/Mined in the past 12 months , we see that the top 3 data types are still

1. table data
2. time series
3. itemsets / transactions

Ignoring Spatial data, which was accidentally excluded from the 2010 poll, Data types with the highest increase in popularity
measured by (pct_usage2010 - pct_usage2009)/pct_usage2009 were

1. other , up 61.3%
2. social network data, up 53.9%
3. anonymized data, up 39.3%

Largest decrease in popularity was for

1. text free-form, down 21.2%
2. images / video, down 39.5%
3. music / audio , down 71.7%