Datasets:
| Year,Brunei Darussalam,Switzerland | |
| 1960,89.0,26.5 | |
| 1964,67.0,23.6 | |
| 1969,51.6,19.2 | |
| 1973,40.6,15.7 | |
| 1978,27.1,11.4 | |
| 1982,19.3,9.7 | |
| 1987,14.2,8.8 | |
| 1991,13.2,7.8 | |
| 1996,11.9,6.2 | |
| 2000,10.3,5.6 | |
| 2005,9.5,5.1 | |
| 2009,9.6,4.6 | |
| 2014,10.0,4.3 | |
| 2018,9.9,4.1 | |
| 2023,9.4,3.9 | |