31.3101-2—Rates and computation of employee tax.
        
        (a) Old-age, survivors, and disability insurance.
         The rates of employee tax for old-age, survivors, and disability insurance with respect to wages received in calendar years after 1954 are as follows:
    
    | Calendar year | Percent | 
|---|---|
| 1955 and 1956 | 2 | 
| 1957 and 1958 | 2.25 | 
| 1959 | 2.5 | 
| 1960 and 1961 | 3 | 
| 1962 | 3.125 | 
| 1963 to 1965, both inclusive | 3.625 | 
| 1966 | 3.85 | 
| 1967 | 3.9 | 
| 1968 | 3.8 | 
| 1969 and 1970 | 4.2 | 
| 1971 and 1972 | 4.6 | 
| 1973 | 4.85 | 
| 1974 to 2010, both inclusive | 4.95 | 
| 2011 and subsequent calendar years | 5.95 | 
        
        (b) Hospital insurance.
         The rates of employee tax for hospital insurance with respect to wages received in calendar years after 1965 are as follows:
    
    | Calendar year | Percent | 
|---|---|
| 1966 | 0.35 | 
| 1967 | .50 | 
| 1968 to 1972, both inclusive | .60 | 
| 1973 | 1.0 | 
| 1974 to 1977, both inclusive | 0.90 | 
| 1978 to 1980, both inclusive | 1.10 | 
| 1981 to 1985, both inclusive | 1.35 | 
| 1986 and subsequent calendar years | 1.50 | 
        
        (c) Computation of employee tax.
         The employee tax is computed by applying  to the wages received by the employee the rate in effect at the time such wages are received.