History http://ctsna.ca/candidates/resources-faq/ tamoxifen nolvadex buy  But that is not what happens. To calculate a cityﾃ｢ﾂ�ﾂ冱 pension liabilities, an actuary instead projects all the contributions the city will probably have to make to the pension fund over time. Many assumptions go into this projection, including an assumption that returns on the investments made by the pension fund will cover most of the planﾃ｢ﾂ�ﾂ冱 costs. The greater the average annual investment returns, the less the city will presumably have to contribute. Pension plan trustees set the rate of return, usually between 7 percent and 8 percent.