param
You can set the list of survey years and language as a list object like list(surveyYears=2012, lang="J").
If survey year is not defined, this year's survey list will return.
When you need data set in English. Define lang="E" instead of lang="J".
Although setting other parameters is allowed in the API, the parameters that can be used in this function is limited into these two types.
The number of parameters can be set in this function will be extended in the future.