I did my mileage tally from October 2010 to October 2011, since that is when I got my first street bike (at age 43). That was my 1st year of street riding. There's probably another 1,000 or so miles on a KTM 450exc dual sport and at least that many on a KTM 300xc.
From October 2010 to October 2011 I rode 32,539. That mileage came from the odometer only. I live in California where the weather is very nice most of the year.
On the following street bikes:
2009 CBR600rr - 2,300 miles (sold)
2010 BMW F650gs - 8,000 miles (sold)
2005 GSXR600 - 1,100 miles (sold)
2010 BMW R1200gs - 14,016 miles
2008 CBR1000rr - 3,804 miles
2002 Goldwing - 3,319 miles
I went through several bikes last year to get the ones that I really want. I'm now seriously considering a sport touring bike to round out the stable!