It jumps about ACP, same for all the algos but as I write this it's sitting around 62TH/s. I've seen it up near 200TH/s. I'm going to post a link to the what to mine site, I personally don't use sites like this to decide what to mine as I find they can sometimes  be misleading but it is one way to look at instantaneous network speeds until someone comes  up with a better tool for this job!
http://www.whattomine.com/coins/113-dgb-sha-256?utf8=%E2%9C%93&hr=8000.0&br=2362.68&d=3037473.087&p=2000.0&fee=3.0&er=0.00000053&cost=0.1&hcost=0.0&btc=248.725&commit=Calculate  

edit: Don't forget to refresh the page when you want a value!