The Federal Office of Statistics has published key figures about occupational pensions in Switzerland. Unfortunately, the latest numbers available date back to 2005. Nevertheless, it is interesting to note that the 2nd pillar's assets have grown to over CHF 540 bio by 2005. That's 117% of GNP. Since 2000, the number of iorps has declined by 19% to 2770. The average number of members per iorp is just shy of 1200.
These statistics have several deficiencies. Available numbers are not timely. Furthermore, we know little about the effective structure of overall liabilities, nor about interest rate sensitivities of assets.