Only 1.5% i read i find interesting?

I'd never looked at the "Trends"-option of Google Reader. Tonight i did: it showed me i've read 4.113 over the last 30 days, of which i shared 62 (my way of saying "worthwhile enough, you should read this to"). The most recent items i've shared are shown on the right. So basically i'm reading 130 items each day on average. I'm told there are lots of people doing more, but nevertheless: i find it takes up a considerable portion of my day. And finding only 1.5% worthwhile, does that mean i should seek other feeds that are more of my interest?