65  This depth of experience continues outside of the Executive Committee. As at 31 March 2014, 31 per cent of Director-level staff$^{(2)}$  have ten years’ experience or more with Macquarie, and a further 35 per cent have between five and ten years’ experience with  Macquarie.  Tenure of Executive Committee members  Number of years at Macquarie  Macquarie continues to have a highly experienced senior management team. The average tenure$^{(1)}$ of Macquarie’s Executive  Committee is approximately 20 years.  One of the primary goals of Macquarie's remuneration arrangements is to attract and retain high performing staff. The Board’s view  is that Macquarie continues to achieve this goal. Overall voluntary turnover has decreased from the prior year and director-level  voluntary turnover of 6.5 per cent remains low and is in line with last year. 3.5 Staff retention has been high, especially at Director level (1) Peers comprise Barclays PLC (Investment Banking segment), Credit Suisse Group AG (Investment Banking segment), Deutsche Bank  AG, Goldman Sachs Group Inc., Jefferies Group Inc., JP Morgan Chase (Corporate and Investment Banking segment), Lazard Ltd,  Morgan Stanley and UBS AG (Investment Banking segment). In order to show more comparable compensation ratios, impairments have  been consistently netted against net revenue in the revised calculations for some peers. Merrill Lynch data has been excluded as its  compensation data cannot be ascertained.  Source: Data has been calculated by Macquarie. The information is based on publicly available information for the peer firms.  Compensation ratio: FY2012–2014$^{(1)}$(%) 