Step 1: The variable plb0057_v1 is recoded (1 2 5=-2) (3=1) (4=2) for the years 1984 to 1996 and subsequently integrated into the harmonized variable plb0057_h2.
Step 2: The variable plb0057_v2 is recoded (1 =3) (2=4) (3 4=-2) for the year 1990 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v1 is not included in that version of the questionnaire.
Step 3: The variable plb0057_v3 is recoded (1 2 6=-2) (3=1) (4=1) (5=2) for the years 1997 to 2013 and subsequently integrated into the harmonized variable plb0057_h2.
Step 4: The variable plb0057_v4 is recoded (1=1) (2=1) (3=2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or plb0057_v3 is 1.
Step 5: The variable plb0057_v5 is recoded (1=1) (2=1) (3=2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or plb0057_v3 is 2.
Step 6: The variable plb0057_v6 is recoded (1=1) (2=1) (3=2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or the variable plb0057_v3 is within the range of 3 - 5.
Step 7: The variable plb0057_v7 is recoded (1=-2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or plb0057_v3 is 6.
Step 8: The variable plb0057_h2 is replaced with -2 for the years 2014 to 2020.
Step 9: The variable plb0057_v8 is recoded (1=1) (2=1) (3=2) for the years 2014 to 2021 and subsequently integrated into the harmonized variable plb0057_h2.
Step 10: The variable plb0057_h2 is replaced with 1 for the year 2021, if the variable plb0057_v10 is within the range of 0 - 9.
Step 11: The variable plb0057_h2 is replaced with 2 for the year 2021, if plb0057_v10 is greater than 9.
Step 12: The variable plb0057_h2 is replaced by the variable plb0057_v10 for the year 2021, if plb0057_v10 is less than 0 and plb0057_v8 is less than 0.
Step 1: The variable plb0057_v1 is recoded (1 2 5=-2) (3=1) (4=2) for the years 1984 to 1996 and subsequently integrated into the harmonized variable plb0057_h2.
Step 2: The variable plb0057_v2 is recoded (1 =3) (2=4) (3 4=-2) for the year 1990 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v1 is not included in that version of the questionnaire.
Step 3: The variable plb0057_v3 is recoded (1 2 6=-2) (3=1) (4=1) (5=2) for the years 1997 to 2013 and subsequently integrated into the harmonized variable plb0057_h2.
Step 4: The variable plb0057_v4 is recoded (1=1) (2=1) (3=2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or plb0057_v3 is 1.
Step 5: The variable plb0057_v5 is recoded (1=1) (2=1) (3=2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or plb0057_v3 is 2.
Step 6: The variable plb0057_v6 is recoded (1=1) (2=1) (3=2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or the variable plb0057_v3 is within the range of 3 - 5.
Step 7: The variable plb0057_v7 is recoded (1=-2) for the years 2000 to 2013 and subsequently integrated into the harmonized variable plb0057_h2, if plb0057_v3 does not apply to the person asked or plb0057_v3 is not included in that version of the questionnaire or plb0057_v3 is 6.
Step 8: The variable plb0057_h2 is replaced with -2 for the years 2014 to 2020.
Step 9: The variable plb0057_v8 is recoded (1=1) (2=1) (3=2) for the years 2014 to 2021 and subsequently integrated into the harmonized variable plb0057_h2.
Step 10: The variable plb0057_h2 is replaced with 1 for the year 2021, if the variable plb0057_v10 is within the range of 0 - 9.
Step 11: The variable plb0057_h2 is replaced with 2 for the year 2021, if plb0057_v10 is greater than 9.
Step 12: The variable plb0057_h2 is replaced by the variable plb0057_v10 for the year 2021, if plb0057_v10 is less than 0 and plb0057_v8 is less than 0.