We have this tree in our front yard and it isn't looking that good. I am guessing it was put in when our house was built in '64 so it is over 50 years old. I'd love to be able to save it if something is wrong with it but I know very little about trees. The very bottom branches have no needles on them and then as you go up the tree the branches become fuller and fuller.
I know some coniferous trees shed their lower limbs but even at the top of this tree it looks like it is losing some needles. We just moved in the house and I don't know any of this trees history.
Here's some more photos in an album: https://goo.gl/photos/XbW5ADuuSNK93SKY9