How much of the solar radiation that hits a transparent glass is actually heating the glass?

You have a transparent (borosilicate) glass window. Sun rays are falling on the glass, which is let’s say placed horizontally. Some of the radiation passes through the glass, some is reflected back but some is absorbed and heats up the glass. How much of that total radiation is actually absorbed and makes the glass heat up? I speculate that would be somewhere around 2-3%. Any specialist in optics or heat flow?