Traditionally, real estate has represented households' largest asset; while the total value of households' real estate holdings grew by 50 percent over the 1990s, real estate steadily declined as a share of households' total assets from 31 percent in 1990 to 23 percent in 1999.
Real estate value was not monitored from 1990 to 2000. 
mnli hypothesis: Real estate value was not monitored from 1990 to 2000.  premise: Traditionally, real estate has represented households' largest asset; while the total value of households' real estate holdings grew by 50 percent over the 1990s, real estate steadily declined as a share of households' total assets from 31 percent in 1990 to 23 percent in 1999.