The best fund in that category had an average return of 12.2 per cent per annum over the five years.
In the conservative category the Staples Rodway Conservative fund is ranked at the bottom over five years but it only recently moved into the conservative category meaning its past performance can not be fairly compared with other funds in the category.
A spokesman for Staples Rodway said the fund had been owned and managed by Funds Administration New Zealand since March 2015 and since taking over the fund the new owners had added income assets resulting in Morningstar re-categorising it.
"This means the historical returns comparison made by Morningstar is not comparing like for like."
Morningstar analyst Elliot Smith said while five years wasn't a full market cycle it was still a decent amount of time to consider the performance of a KiwiSaver fund.
"If they [members] are not happy they should be asking questions of their provider," he said.
And if the member wasn't happy with the response they got from their provider they should consider looking elsewhere, he added.
But Smith also cautioned savers against chasing the top performing funds.
"As we state at the top of our results the past performance isn't a guide to future performance."
Smith said KiwiSaver members should make sure they were in the correct type of fund for them before thinking about which provider to choose.
KiwiSaver funds typically fall into three general categories of conservative, balanced and growth with different risks and rewards attached to them.
Choosing the right fund can depend on what stage in life you are at and what kind of risk you are prepared to take on.
As we state at the top of our results the past performance isn't a guide to future performance.
Smith said fees and services were also important factors to consider.
He said people with low account balances should be wary of providers with high annual fees as it could eat away at their savings.
While good service meant providers went over and above the minimum requirements to provide information to their members.
All providers are required to report quarterly on the performance of their KiwiSaver funds but most just put the information up on their websites.
Smith said good service meant providers sent information directly to their members particularly when markets went through a rough patch to explain what was going on.
They also had people on hand to talk to if a member needed to call up and ask questions about what was happening to their KiwiSaver.
Morningstar figures show KiwiSaver funds continued to perform strongly in 2015 despite market turbulence incited by fears around China's growth.
Conservative funds grew on average by 4.9 per cent last year, while balanced funds were up 6.6 per cent on average and growth funds grew an average of 8.3 per cent.
There is now more than $30.8 billion invested in KiwiSaver up $5.7 billion in the last year.
Check out the performance of your fund here:
