the BoP for Switzerland was CHF 69 billion, which is an increase of CHF 49 billion from 2020, a year that was probably heavily influenced by COVID-19. However, in 2021, the net international investment position decreased by CHF 98 billion to CHF 667 billion year-on-year, as liabilities increased more strongly than assets; stocks of assets were up by CHF 317 billion to CHF 5,594 billion, while stocks of liabilities increased by CHF 415 billion to CHF 4,927 billion. can anyone explain to me from an economic perspective of why there was a decrease in international investment in Switzerland?