#+TBLNAME: funds
| year | amount |
|------+--------|
| 2010 |   1234 |
| 2011 |   1254 |
| 2012 |   4000 |
| 2013 |    123 |

#+TBLNAME: diff
| year |  diff |
|------+-------|
| 2011 |    20 |
| 2012 |  2746 |
| 2013 | -3877 |
#+TBLFM: @2$1=remote(funds,@3$1)::@2$2=remote(funds,@3$2)-remote(funds,@2$2)
#+TBLFM: @3$1=remote(funds,@4$1)::@3$2=remote(funds,@4$2)-remote(funds,@3$2)
#+TBLFM: @4$1=remote(funds,@5$1)::@4$2=remote(funds,@5$2)-remote(funds,@4$2)

how to make the above simpler?