Найдите 100 самых популярных клиентов и их средние расходы, среднее количество за каждый год. Также найдите процент изменения их расходов

Question

SELECT 
  T1.Customer_Name, T1.Year, T1.Avg_Price,T1.Avg_Qty,
    CASE
        WHEN T2.Year IS NOT NULL
        THEN FORMAT(CONVERT(DECIMAL(8,2),(T1.Avg_Price-T2.Avg_Price))/CONVERT(DECIMAL(8,2),T2.Avg_Price),'p') ELSE NULL 
        END AS 'YEARLY_%_CHANGE'
    FROM
        (SELECT t2.Customer_Name, YEAR(t1.DATE) AS YEAR, AVG(t1.TotalPrice) AS Avg_Price, AVG(t1.Quantity) AS Avg_Qty FROM FACT_TRANSACTIONS AS t1 
        left join DIM_CUSTOMER as t2 ON t1.IDCustomer=t2.IDCustomer
        where t1.IDCustomer in (select top 100 IDCustomer from FACT_TRANSACTIONS group by IDCustomer order by SUM(TotalPrice) desc)
        group by t2.Customer_Name, YEAR(t1.Date)
        )T1
    left join
        (SELECT t2.Customer_Name, YEAR(t1.DATE) AS YEAR, AVG(t1.TotalPrice) AS Avg_Price, AVG(t1.Quantity) AS Avg_Qty FROM FACT_TRANSACTIONS AS t1 
        left join DIM_CUSTOMER as t2 ON t1.IDCustomer=t2.IDCustomer
        where t1.IDCustomer in (select top 100 IDCustomer from FACT_TRANSACTIONS group by IDCustomer order by SUM(TotalPrice) desc)
        group by t2.Customer_Name, YEAR(t1.Date)
        )T2
        on T1.Customer_Name=T2.Customer_Name and T2.YEAR=T1.YEAR-1

Годы не непрерывны. Какие изменения я должен внести, чтобы получить правильный результат?

3-е и 4-е значение в этом примере выходных данных:

Angella Cetta   2003    170.00  1   NULL
Angella Cetta   2004    282.50  1   66.18%
Angella Cetta   2007    300.00  1   NULL
Angella Cetta   2010    173.00  1   NULL