Notes to the consolidated financial statements of Aegon N.V.  Note 43 260 The investment strategy for the scheme is determined by the Trustees in consultation with Aegon UK. Currently 40% of assets are  invested in growth assets (i.e. primarily equities) and 60% are Liability Driven Investments where the investments are a portfolio of  fixed interest and inflation linked bonds and related derivatives, selected to broadly match the interest rate and inflation profile of  liabilities. Under the scheme rules pensions in payment increase in line with the UK Retail Price Index, and deferred benefits increase in line  with the UK Consumer Price Index. The pension scheme is therefore exposed to UK inflation changes as well as interest rate risks,  investment returns and changes in the life expectancy of pensioners. The weighted average duration of the defined benefit obligation is 24.4 years (2012: 25.0 years). The principal actuarial assumptions that apply for the year ended December 31 are as follows: 1  SAPS S1NA light -2 years CMI 2012 1.25% p.a. 2  SAPS S1NA light -2 years CMI 2011 1.25% p.a. The principal actuarial assumptions have an effect on the amounts reported for the defined benefit obligation. A change as indicated in  the table below in the principal actuarial assumptions would have the following effects on the defined benefit obligation per year-end: The above sensitivity analysis is based on a change in an assumption while holding all other assumptions constant. In practice, this  is unlikely to occur, and changes in some of the assumptions may be correlated. When calculating the sensitivity of the defined  benefit obligation to significant actuarial assumptions the same method (present value of the defined benefit obligation calculated  with the projected unit credit method at the end of the reporting period) has been applied as when calculating the pension liability  recognized within the statement of financial position. New Markets mostly operate defined contribution plans. New Markets Annual Report 2013 2013 Target allocation of plan  assets for retirement  benefit plans for The next annual period is: Equity instruments 40% Debt instruments 60% 2013 Estimated approximate  effects on the defined  benefit obligation Demographic actuarial assumptions 10% increase in mortality rates (24) 10% decrease in mortality rates 26 Financial actuarial assumptions 100 basis points increase in discount rate (250) 100 basis points decrease in discount rate 344 100 basis points increase in price inflation 132 100 basis points decrease in price inflation (204) Actuarial assumptions used to determine defined benefit obligations at year­end 2013 2012 Demographic actuarial assumptions Mortality UK mortality  table  1) UK mortality  table  2) Financial actuarial assumptions Discount rate 4.60% 4.60% Price inflation 3.40% 3.00%