I've had my lightroom sorted by year which makes it fascinating to start checking out how the number of photos changed as you started to take photography more seriously. Mine was when I bought my D700

2004 - 2000 photos
2005 - 1900 photos
2006 - 2100 photos
2007 - 2900 photos
2008 - 3500 photos
2009 - 3100 photos
2010 - 3100 photos
2011 - 3300 photos
2012 - 6800 photos (got my D700 in April and started to take it more seriously)
2013 - 9103 photos
2014 - 9400 photos(till july)