1[] Less than 6 months
2[] 6 months, but less than 1 year
3[] 1 year, but less than 2 years
4[] 2 years or more
9[] DK

1[] Less than 6 months
2[] 6 months, but less than 1 year
3[] 1 year, but less than 2 years
4[] 2 years or more
9[] DK

[] 1 Less than 6 months (1d for ND with 1d, or 2 on page 18)
[] 2 6 months, but less than 1 year (1d for ND with 1d, or 2 on page 18)
[] 3 1 year, but less than 2 years (1d for ND with 1d, or 2 on page 18)
[] 4 2 years or more (1d for ND with 1d, or 2 on page 18)
[] 9 DK (1d for ND with 1d, or 2 on page 18)

1 [] Under age 67 (1g)
2 [] Age 67 or older (NP)

1 [] Less than 6 months
2 [] 6 months, but less than 1 year
3 [] 1 year, but less than 2 years
4 [] 2 years or more
9 [] DK