Gen Z/ZAlpha teen similarity score
**Teen Years Similarity Index (Reference: 1997 birth year = 100%)**
**Method:** Teen years are divided into:
**Early teens:** ages 13–15 (3 years)
**Late teens:** ages 16–19 (4 years)
Only overlap within the same teen stage is counted.
**1997 teen period:**
Early teens: **2010–2012**
Late teens: **2013–2016**
**Similarity to 1997:**
**1997:** 100% similarity
**1998:** 71.4% similarity
**1999:** 42.9% similarity
**2000:** 14.3% similarity
**2001:** 0% similarity
**2002:** 0% similarity
**2003:** 0% similarity
**2004:** 0% similarity
**2005:** 0% similarity
**2006:** 0% similarity
**2007:** 0% similarity
**2008:** 0% similarity
**2009:** 0% similarity
**2010:** 0% similarity
**2011:** 0% similarity
**2012:** 0% similarity
**Calculation basis:**
A 1997-born person’s teen years span **2010–2016**:
Early teens: **2010–2012**
Late teens: **2013–2016**
Each overlapping year within the same teen stage contributes:
Early teens: **1/7 = 14.3% per year**
Late teens: **1/7 = 14.3% per year**
This shows that later Gen Z cohorts may share the **same cultural era** as earlier cohorts, but not necessarily the same **life stage** when experiencing it.
**Teen Years Similarity Index (Reference: 2001 birth year = 100%)**
**Method:** Teen years are divided into:
**Early teens:** ages 13–15 (3 years)
**Late teens:** ages 16–19 (4 years)
Only overlap within the same teen stage is counted.
**2001 teen period:**
Early teens: **2014–2016**
Late teens: **2017–2020**
**Similarity to 2001:**
**2001:** 100% similarity
**2002:** 71.4% similarity
**2003:** 42.9% similarity
**2004:** 14.3% similarity
**2005:** 0% similarity
**2006:** 0% similarity
**2007:** 0% similarity
**2008:** 0% similarity
**2009:** 0% similarity
**2010:** 0% similarity
**2011:** 0% similarity
**2012:** 0% similarity
**2013:** 0% similarity
**2014:** 0% similarity
**2015:** 0% similarity
**2016:** 0% similarity
**Calculation basis:**
A 2001-born person’s teen years span **2014–2020**:
Early teens: **2014–2016**
Late teens: **2017–2020**
Each shared teen-stage year contributes **14.3%** of the total teen similarity score.
**Teen Years Similarity Index (Reference: 2005 birth year = 100%)**
**Method:** Teen years are divided into:
**Early teens:** ages 13–15 (3 years)
**Late teens:** ages 16–19 (4 years)
Only overlap within the same teen stage is counted.
**2005 teen period:**
Early teens: **2018–2020**
Late teens: **2021–2024**
**Similarity to 2005:**
**2005:** 100% similarity
**2006:** 71.4% similarity
**2007:** 42.9% similarity
**2008:** 14.3% similarity
**2009:** 0% similarity
**2010:** 0% similarity
**2011:** 0% similarity
**2012:** 0% similarity
**2013:** 0% similarity
**2014:** 0% similarity
**2015:** 0% similarity
**2016:** 0% similarity
**2017:** 0% similarity
**2018:** 0% similarity
**2019:** 0% similarity
**2020:** 0% similarity
**Calculation basis:**
A 2005-born person’s teen years span **2018–2024**:
Early teens: **2018–2020**
Late teens: **2021–2024**
Each overlapping teen-stage year contributes **14.3%** of the total teen similarity score.
**Teen Years Similarity Index (Reference: 2009 birth year = 100%)**
**Method:** Teen years are divided into:
**Early teens:** ages 13–15 (3 years)
**Late teens:** ages 16–19 (4 years)
Only overlap within the same teen stage is counted.
**2009 teen period:**
Early teens: **2022–2024**
Late teens: **2025–2028**
**Similarity to 2009:**
**2009:** 100% similarity
**2010:** 71.4% similarity
**2011:** 42.9% similarity
**2012:** 14.3% similarity
**2013:** 0% similarity
**2014:** 0% similarity
**2015:** 0% similarity
**2016:** 0% similarity
**2017:** 0% similarity
**2018:** 0% similarity
**2019:** 0% similarity
**2020:** 0% similarity
**2021:** 0% similarity
**2022:** 0% similarity
**2023:** 0% similarity
**2024:** 0% similarity
**Calculation basis:**
A 2009-born person’s teen years span **2022–2028**:
Early teens: **2022–2024**
Late teens: **2025–2028**
Each shared teen-stage year contributes **14.3%** of the total teen similarity score.
**Teen Years Similarity Index (Reference: 2013 birth year = 100%)**
**Method:** Teen years are divided into:
**Early teens:** ages 13–15 (3 years)
**Late teens:** ages 16–19 (4 years)
Only overlap within the same teen stage is counted.
**2013 teen period:**
Early teens: **2026–2028**
Late teens: **2029–2032**
**Similarity to 2013:**
**2013:** 100% similarity
**2014:** 71.4% similarity
**2015:** 42.9% similarity
**2016:** 14.3% similarity
**2017:** 0% similarity
**2018:** 0% similarity
**2019:** 0% similarity
**2020:** 0% similarity
**2021:** 0% similarity
**2022:** 0% similarity
**2023:** 0% similarity
**2024:** 0% similarity
**2025:** 0% similarity
**2026:** 0% similarity
**2027:** 0% similarity
**2028:** 0% similarity
**Calculation basis:**
A 2013-born person’s teen years span **2026–2032**:
Early teens: **2026–2028**
Late teens: **2029–2032**
Each shared teen-stage year contributes **14.3%** of the total teen similarity score.